<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2022 Workiva-->
<!--r:685c753c-4792-40ec-a628-eddd0f7923c6,g:8821b719-552e-47d9-874e-4d3b1315bcc6-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.rtx.com/role/DocumentandEntityInformation" xlink:type="simple" xlink:href="rtx-20220630.xsd#DocumentandEntityInformation"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/DocumentandEntityInformation" xlink:type="extended" id="i461a8f6c8f684881a62ac0d3ff9adc2e_DocumentandEntityInformation">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_719c3a6f-d9d1-4924-bdaf-f63ca66c1e8e" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_DocumentType_719c3a6f-d9d1-4924-bdaf-f63ca66c1e8e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_eafe8cde-25c6-489b-8adc-1a983e8c02a8" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_DocumentQuarterlyReport_eafe8cde-25c6-489b-8adc-1a983e8c02a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_6912efa6-d692-4deb-8f84-fef5d2ae69f1" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_DocumentPeriodEndDate_6912efa6-d692-4deb-8f84-fef5d2ae69f1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_4664f635-f690-48b1-ac6b-66de51d8d8cc" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_DocumentTransitionReport_4664f635-f690-48b1-ac6b-66de51d8d8cc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_d102e3a1-db97-48c9-826b-979799fd3ecc" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_EntityFileNumber_d102e3a1-db97-48c9-826b-979799fd3ecc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_c6677020-f744-4319-a5f0-b308dbb4879b" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_EntityRegistrantName_c6677020-f744-4319-a5f0-b308dbb4879b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_6bdeca14-ff2f-484a-9518-1c31095df96e" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_EntityIncorporationStateCountryCode_6bdeca14-ff2f-484a-9518-1c31095df96e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_6f2b3b1f-8e7d-4548-80a3-80b510e42357" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_EntityTaxIdentificationNumber_6f2b3b1f-8e7d-4548-80a3-80b510e42357" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_91bb5382-99ab-4025-aa94-b87ac2e04738" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_EntityAddressAddressLine1_91bb5382-99ab-4025-aa94-b87ac2e04738" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_ff44bf8c-884e-45bb-8281-a1c276dd3cf5" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_EntityAddressCityOrTown_ff44bf8c-884e-45bb-8281-a1c276dd3cf5" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_0994e63d-ff74-4cec-bbcf-b6e52d99fe28" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_EntityAddressStateOrProvince_0994e63d-ff74-4cec-bbcf-b6e52d99fe28" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_29e716ae-f7e8-4389-9acf-3b8dca39d094" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_EntityAddressPostalZipCode_29e716ae-f7e8-4389-9acf-3b8dca39d094" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_4cacb88e-2814-4f2c-b6ba-c064e2d4110d" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_CityAreaCode_4cacb88e-2814-4f2c-b6ba-c064e2d4110d" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_349343bb-9a23-4dc8-a8e4-60b0f252703e" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_LocalPhoneNumber_349343bb-9a23-4dc8-a8e4-60b0f252703e" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_47db39b4-2e6a-491c-81bd-64d8a0e13ee0" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_Security12bTitle_47db39b4-2e6a-491c-81bd-64d8a0e13ee0" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_5d1608f0-1099-4281-a75a-46cc6b36ea3e" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_TradingSymbol_5d1608f0-1099-4281-a75a-46cc6b36ea3e" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_9885349b-2dc4-423d-9694-cd95629656ec" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_SecurityExchangeName_9885349b-2dc4-423d-9694-cd95629656ec" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_4daa9055-6707-4e2d-bf7e-2f9f3976a046" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_EntityCurrentReportingStatus_4daa9055-6707-4e2d-bf7e-2f9f3976a046" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_bd56018b-683b-4926-9fda-62cf59a11103" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_EntityInteractiveDataCurrent_bd56018b-683b-4926-9fda-62cf59a11103" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_3f567ca7-63cc-46b8-b6a8-0b1d71254cb1" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_EntityFilerCategory_3f567ca7-63cc-46b8-b6a8-0b1d71254cb1" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_a4308820-0b6d-41fc-9e7a-1bd9a9b65c13" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_EntitySmallBusiness_a4308820-0b6d-41fc-9e7a-1bd9a9b65c13" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_f1d81674-0d1b-40e6-9b45-ef5d72b73530" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_EntityEmergingGrowthCompany_f1d81674-0d1b-40e6-9b45-ef5d72b73530" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_3e68117b-38c5-4e84-86e7-3a516354ca09" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_EntityShellCompany_3e68117b-38c5-4e84-86e7-3a516354ca09" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_ea42df63-597d-4774-a15c-b8d8abf3b469" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_ea42df63-597d-4774-a15c-b8d8abf3b469" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_af60a9f2-735b-429a-aca3-61a92b381544" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_AmendmentFlag_af60a9f2-735b-429a-aca3-61a92b381544" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_c9db5748-9c38-428e-8b6c-25e6c6f90d33" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_DocumentFiscalYearFocus_c9db5748-9c38-428e-8b6c-25e6c6f90d33" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_34788cce-95c5-4e7a-b73d-3fcffa01b614" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_DocumentFiscalPeriodFocus_34788cce-95c5-4e7a-b73d-3fcffa01b614" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_fae3f41b-3d04-4eec-bb1e-5b0261a77cf3" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_CurrentFiscalYearEndDate_fae3f41b-3d04-4eec-bb1e-5b0261a77cf3" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_01e799bf-f7a7-450b-8808-143873f8c12b" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_dei_EntityCentralIndexKey_01e799bf-f7a7-450b-8808-143873f8c12b" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_2e10688b-96ac-429b-a407-b05ae74c8fc0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_c8893a3a-0602-4c7c-9c37-73fdfb575c50" xlink:to="loc_us-gaap_StatementTable_2e10688b-96ac-429b-a407-b05ae74c8fc0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_a7023225-4ef1-4269-9de2-329823d0255c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_2e10688b-96ac-429b-a407-b05ae74c8fc0" xlink:to="loc_us-gaap_StatementClassOfStockAxis_a7023225-4ef1-4269-9de2-329823d0255c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_a7023225-4ef1-4269-9de2-329823d0255c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_a7023225-4ef1-4269-9de2-329823d0255c" xlink:to="loc_us-gaap_ClassOfStockDomain_a7023225-4ef1-4269-9de2-329823d0255c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_612fe4b7-1032-46a2-af24-dc02ebd8bceb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_a7023225-4ef1-4269-9de2-329823d0255c" xlink:to="loc_us-gaap_ClassOfStockDomain_612fe4b7-1032-46a2-af24-dc02ebd8bceb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_498e7f75-74ad-4067-8889-760a66bf18b2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_612fe4b7-1032-46a2-af24-dc02ebd8bceb" xlink:to="loc_us-gaap_CommonStockMember_498e7f75-74ad-4067-8889-760a66bf18b2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes2.150Due2030Member_1a0ee425-343e-4c89-9863-2684476eeffe" xlink:href="rtx-20220630.xsd#rtx_Notes2.150Due2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_612fe4b7-1032-46a2-af24-dc02ebd8bceb" xlink:to="loc_rtx_Notes2.150Due2030Member_1a0ee425-343e-4c89-9863-2684476eeffe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesAddressTypeAxis_b1f2691d-1485-4774-8e8d-c89d1a33aa5e" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressesAddressTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_2e10688b-96ac-429b-a407-b05ae74c8fc0" xlink:to="loc_dei_EntityAddressesAddressTypeAxis_b1f2691d-1485-4774-8e8d-c89d1a33aa5e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AddressTypeDomain_b1f2691d-1485-4774-8e8d-c89d1a33aa5e_default" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_AddressTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_b1f2691d-1485-4774-8e8d-c89d1a33aa5e" xlink:to="loc_dei_AddressTypeDomain_b1f2691d-1485-4774-8e8d-c89d1a33aa5e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AddressTypeDomain_7404b5b1-4081-4425-af87-5de0646644a4" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_AddressTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_b1f2691d-1485-4774-8e8d-c89d1a33aa5e" xlink:to="loc_dei_AddressTypeDomain_7404b5b1-4081-4425-af87-5de0646644a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_FormerAddressMember_e0a911de-b1fa-4616-913e-f8099297d6bd" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_FormerAddressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_AddressTypeDomain_7404b5b1-4081-4425-af87-5de0646644a4" xlink:to="loc_dei_FormerAddressMember_e0a911de-b1fa-4616-913e-f8099297d6bd" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/CondensedConsolidatedStatementofOperations" xlink:type="simple" xlink:href="rtx-20220630.xsd#CondensedConsolidatedStatementofOperations"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/CondensedConsolidatedStatementofOperations" xlink:type="extended" id="i7faeaa165edb4abb98a65ebb6e29a40e_CondensedConsolidatedStatementofOperations">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_9d0f3420-2fed-4b22-b8c5-1eb9a8fc4d51" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_146d28da-7c84-46a4-beeb-2b4f12727158" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9d0f3420-2fed-4b22-b8c5-1eb9a8fc4d51" xlink:to="loc_us-gaap_RevenuesAbstract_146d28da-7c84-46a4-beeb-2b4f12727158" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_220f9a42-ade7-4a57-aa44-c24f311f31cb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_146d28da-7c84-46a4-beeb-2b4f12727158" xlink:to="loc_us-gaap_Revenues_220f9a42-ade7-4a57-aa44-c24f311f31cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpensesAbstract_8d9832e4-4c74-4f95-98ea-f9a4b7188870" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CostsAndExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9d0f3420-2fed-4b22-b8c5-1eb9a8fc4d51" xlink:to="loc_us-gaap_CostsAndExpensesAbstract_8d9832e4-4c74-4f95-98ea-f9a4b7188870" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_2133fbc8-3235-47cd-a6a9-960786780d9a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_8d9832e4-4c74-4f95-98ea-f9a4b7188870" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_2133fbc8-3235-47cd-a6a9-960786780d9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_3cd868b0-f2d7-4d5d-b169-a384c71a13a4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_8d9832e4-4c74-4f95-98ea-f9a4b7188870" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_3cd868b0-f2d7-4d5d-b169-a384c71a13a4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_dfb2886a-ab74-4ceb-b1d5-e638f57ebda8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_8d9832e4-4c74-4f95-98ea-f9a4b7188870" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_dfb2886a-ab74-4ceb-b1d5-e638f57ebda8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_5b0acef0-d418-4e41-86af-0dff7c508027" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_8d9832e4-4c74-4f95-98ea-f9a4b7188870" xlink:to="loc_us-gaap_CostsAndExpenses_5b0acef0-d418-4e41-86af-0dff7c508027" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncome_e32a8026-e7fa-49cb-9742-192a6e67b9ba" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherOperatingIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9d0f3420-2fed-4b22-b8c5-1eb9a8fc4d51" xlink:to="loc_us-gaap_OtherOperatingIncome_e32a8026-e7fa-49cb-9742-192a6e67b9ba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_3637a382-1968-4430-b4f2-f09c7e915a66" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9d0f3420-2fed-4b22-b8c5-1eb9a8fc4d51" xlink:to="loc_us-gaap_OperatingIncomeLoss_3637a382-1968-4430-b4f2-f09c7e915a66" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent_3bdea8b7-4b62-4f0d-a12a-512814df0be5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9d0f3420-2fed-4b22-b8c5-1eb9a8fc4d51" xlink:to="loc_us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent_3bdea8b7-4b62-4f0d-a12a-512814df0be5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_8201f623-2133-453f-94c7-5d433dae563f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9d0f3420-2fed-4b22-b8c5-1eb9a8fc4d51" xlink:to="loc_us-gaap_InterestExpense_8201f623-2133-453f-94c7-5d433dae563f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_15249136-9534-4a39-a758-8b0ad04875ca" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9d0f3420-2fed-4b22-b8c5-1eb9a8fc4d51" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_15249136-9534-4a39-a758-8b0ad04875ca" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2b83385d-a0f3-4031-8151-71b2295bdefd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9d0f3420-2fed-4b22-b8c5-1eb9a8fc4d51" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2b83385d-a0f3-4031-8151-71b2295bdefd" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_4a1241d1-976e-49f5-9e93-07f13c53f497" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9d0f3420-2fed-4b22-b8c5-1eb9a8fc4d51" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_4a1241d1-976e-49f5-9e93-07f13c53f497" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_486b7a35-b938-4476-b313-84151d55013e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9d0f3420-2fed-4b22-b8c5-1eb9a8fc4d51" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_486b7a35-b938-4476-b313-84151d55013e" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity_152fac4d-a908-45ae-9101-2118aa1eeebd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9d0f3420-2fed-4b22-b8c5-1eb9a8fc4d51" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity_152fac4d-a908-45ae-9101-2118aa1eeebd" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperations_7a0bbc41-6db4-4554-998e-c125e1d428b0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9d0f3420-2fed-4b22-b8c5-1eb9a8fc4d51" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperations_7a0bbc41-6db4-4554-998e-c125e1d428b0" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_69ac0078-fb5a-4205-ac2d-6fbd6e25c2dc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9d0f3420-2fed-4b22-b8c5-1eb9a8fc4d51" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_69ac0078-fb5a-4205-ac2d-6fbd6e25c2dc" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_788eafb6-ac5f-4455-a14b-4bea7b9d579c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9d0f3420-2fed-4b22-b8c5-1eb9a8fc4d51" xlink:to="loc_us-gaap_NetIncomeLoss_788eafb6-ac5f-4455-a14b-4bea7b9d579c" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasicAbstract_df2fcbd5-313b-41c6-ac59-96227651a0ac" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareBasicAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9d0f3420-2fed-4b22-b8c5-1eb9a8fc4d51" xlink:to="loc_us-gaap_EarningsPerShareBasicAbstract_df2fcbd5-313b-41c6-ac59-96227651a0ac" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_e6e7ed19-c2fc-46b8-98d5-ade38c778fab" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsPerBasicShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicAbstract_df2fcbd5-313b-41c6-ac59-96227651a0ac" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_e6e7ed19-c2fc-46b8-98d5-ade38c778fab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare_7de32568-3cf3-40da-8f42-1a629f405c69" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicAbstract_df2fcbd5-313b-41c6-ac59-96227651a0ac" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare_7de32568-3cf3-40da-8f42-1a629f405c69" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_342a16d4-4d0d-4ef0-9b31-5dc09b0b69c1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicAbstract_df2fcbd5-313b-41c6-ac59-96227651a0ac" xlink:to="loc_us-gaap_EarningsPerShareBasic_342a16d4-4d0d-4ef0-9b31-5dc09b0b69c1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDilutedAbstract_c1c47b0a-43f8-4bf3-97d0-10f516046610" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareDilutedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9d0f3420-2fed-4b22-b8c5-1eb9a8fc4d51" xlink:to="loc_us-gaap_EarningsPerShareDilutedAbstract_c1c47b0a-43f8-4bf3-97d0-10f516046610" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_cdb1036f-5490-4203-af46-aed430b20263" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedAbstract_c1c47b0a-43f8-4bf3-97d0-10f516046610" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_cdb1036f-5490-4203-af46-aed430b20263" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare_4c0ef6fd-e1b9-4f0e-a2fd-847bb48214c0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedAbstract_c1c47b0a-43f8-4bf3-97d0-10f516046610" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare_4c0ef6fd-e1b9-4f0e-a2fd-847bb48214c0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_bc86dce4-3597-4b13-ad18-da66477d9a66" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedAbstract_c1c47b0a-43f8-4bf3-97d0-10f516046610" xlink:to="loc_us-gaap_EarningsPerShareDiluted_bc86dce4-3597-4b13-ad18-da66477d9a66" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_5a9c2bec-94d3-42ab-b96a-413e46e80851" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_9d0f3420-2fed-4b22-b8c5-1eb9a8fc4d51" xlink:to="loc_us-gaap_StatementTable_5a9c2bec-94d3-42ab-b96a-413e46e80851" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_90273926-93b4-42f3-9b80-2ec72a62010a" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_5a9c2bec-94d3-42ab-b96a-413e46e80851" xlink:to="loc_srt_ProductOrServiceAxis_90273926-93b4-42f3-9b80-2ec72a62010a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_90273926-93b4-42f3-9b80-2ec72a62010a_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_90273926-93b4-42f3-9b80-2ec72a62010a" xlink:to="loc_srt_ProductsAndServicesDomain_90273926-93b4-42f3-9b80-2ec72a62010a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_b0a2bb71-7421-4524-a8aa-9d3b7bf5464f" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_90273926-93b4-42f3-9b80-2ec72a62010a" xlink:to="loc_srt_ProductsAndServicesDomain_b0a2bb71-7421-4524-a8aa-9d3b7bf5464f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductMember_b7dec702-f9b8-4c92-afe2-ba9950176269" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProductMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_b0a2bb71-7421-4524-a8aa-9d3b7bf5464f" xlink:to="loc_us-gaap_ProductMember_b7dec702-f9b8-4c92-afe2-ba9950176269" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServiceMember_3df1ed42-23a0-43c4-a31b-9190fe35e5bb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_b0a2bb71-7421-4524-a8aa-9d3b7bf5464f" xlink:to="loc_us-gaap_ServiceMember_3df1ed42-23a0-43c4-a31b-9190fe35e5bb" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/CondensedConsolidatedStatementofChangesinEquityStatement" xlink:type="simple" xlink:href="rtx-20220630.xsd#CondensedConsolidatedStatementofChangesinEquityStatement"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/CondensedConsolidatedStatementofChangesinEquityStatement" xlink:type="extended" id="i556fb3bf7da54b5b8849198dff45394a_CondensedConsolidatedStatementofChangesinEquityStatement">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_7bc37e77-4bf0-48ef-b901-f0b9a1587fef" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_7bc37e77-4bf0-48ef-b901-f0b9a1587fef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_1a6d1a58-4668-4bae-b7a2-ccdc6df7a761" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_us-gaap_StockholdersEquity_1a6d1a58-4668-4bae-b7a2-ccdc6df7a761" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_289421d5-d1f2-4b4e-bc3a-7b920a4f5c85" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_289421d5-d1f2-4b4e-bc3a-7b920a4f5c85" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_a3a8dd1f-b47c-43f5-bd0e-dd9311e890c9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MinorityInterestDecreaseFromRedemptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_a3a8dd1f-b47c-43f5-bd0e-dd9311e890c9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_9d012642-056d-46c4-b183-faf100539f7b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_9d012642-056d-46c4-b183-faf100539f7b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityOther_306e2ccb-bc4d-43bf-b9d9-7a9439857f5d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_us-gaap_StockholdersEquityOther_306e2ccb-bc4d-43bf-b9d9-7a9439857f5d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_6aec11f8-8bba-4904-9253-411aa5f47ec8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_us-gaap_NetIncomeLoss_6aec11f8-8bba-4904-9253-411aa5f47ec8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock_790d1339-aeed-45c8-9d12-9443582c74fa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_us-gaap_DividendsCommonStock_790d1339-aeed-45c8-9d12-9443582c74fa" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOwnershipPlanESOPDividendsPaidToESOP_9bf438ab-9a77-4557-8199-fada6767612f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeStockOwnershipPlanESOPDividendsPaidToESOP"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_us-gaap_EmployeeStockOwnershipPlanESOPDividendsPaidToESOP_9bf438ab-9a77-4557-8199-fada6767612f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_2dd120ed-053b-4891-919d-3009549a475a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_2dd120ed-053b-4891-919d-3009549a475a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterest_5261930a-71f7-4246-b004-192aa921bf5f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MinorityInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_us-gaap_MinorityInterest_5261930a-71f7-4246-b004-192aa921bf5f" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_b94a08e1-bcf6-444c-9acf-b0535249cce4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_b94a08e1-bcf6-444c-9acf-b0535249cce4" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_2f381d43-97cb-45e5-91e3-f64fc90106f5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_2f381d43-97cb-45e5-91e3-f64fc90106f5" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_28581332-dd94-44fc-817b-12e905c1893f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_28581332-dd94-44fc-817b-12e905c1893f" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Noncontrollinginterestdecreasefromdispositionofnoncontrollinginterest_8a03105c-1536-42c6-ad09-0f77b8d29e59" xlink:href="rtx-20220630.xsd#rtx_Noncontrollinginterestdecreasefromdispositionofnoncontrollinginterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_rtx_Noncontrollinginterestdecreasefromdispositionofnoncontrollinginterest_8a03105c-1536-42c6-ad09-0f77b8d29e59" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_NoncontrollingInterestIncreasefromCapitalContributions_8f9b90f4-348c-4a7f-baee-83909305ef2e" xlink:href="rtx-20220630.xsd#rtx_NoncontrollingInterestIncreasefromCapitalContributions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_rtx_NoncontrollingInterestIncreasefromCapitalContributions_8f9b90f4-348c-4a7f-baee-83909305ef2e" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_f108205e-3b07-4fb5-9954-b495e63538aa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_f108205e-3b07-4fb5-9954-b495e63538aa" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_b04e4f9c-c128-4e1b-969d-24af20b26a3d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_b04e4f9c-c128-4e1b-969d-24af20b26a3d" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_f19fb3fb-073b-4b70-9296-32d6e88de67d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_f19fb3fb-073b-4b70-9296-32d6e88de67d" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_ee4f2a88-7b7e-4786-9de2-2fc9e20aa6d6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_1c39be8b-3445-403e-9e4c-4f3b76130518" xlink:to="loc_us-gaap_StatementTable_ee4f2a88-7b7e-4786-9de2-2fc9e20aa6d6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_00005c70-f215-4c13-b2c9-e5c92de33656" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_ee4f2a88-7b7e-4786-9de2-2fc9e20aa6d6" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_00005c70-f215-4c13-b2c9-e5c92de33656" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_00005c70-f215-4c13-b2c9-e5c92de33656_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_00005c70-f215-4c13-b2c9-e5c92de33656" xlink:to="loc_us-gaap_EquityComponentDomain_00005c70-f215-4c13-b2c9-e5c92de33656_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_29fddd9b-c5f6-47ab-b7ce-a3fd6475d84b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_00005c70-f215-4c13-b2c9-e5c92de33656" xlink:to="loc_us-gaap_EquityComponentDomain_29fddd9b-c5f6-47ab-b7ce-a3fd6475d84b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_5fa2dad6-fc7b-41f8-a8cf-22091053a780" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_29fddd9b-c5f6-47ab-b7ce-a3fd6475d84b" xlink:to="loc_us-gaap_CommonStockMember_5fa2dad6-fc7b-41f8-a8cf-22091053a780" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockMember_7c346a99-a819-4f64-95a8-1c3c872b89c6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TreasuryStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_29fddd9b-c5f6-47ab-b7ce-a3fd6475d84b" xlink:to="loc_us-gaap_TreasuryStockMember_7c346a99-a819-4f64-95a8-1c3c872b89c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_525b0359-fc58-4c08-ac5b-74c40ab08a33" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_29fddd9b-c5f6-47ab-b7ce-a3fd6475d84b" xlink:to="loc_us-gaap_RetainedEarningsMember_525b0359-fc58-4c08-ac5b-74c40ab08a33" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationShareBasedPaymentsMember_d67527d0-babb-4850-a79b-0c456d9d2a01" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredCompensationShareBasedPaymentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_29fddd9b-c5f6-47ab-b7ce-a3fd6475d84b" xlink:to="loc_us-gaap_DeferredCompensationShareBasedPaymentsMember_d67527d0-babb-4850-a79b-0c456d9d2a01" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_54fc8e4a-b17a-42cd-87c0-eab4117b1e9d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_29fddd9b-c5f6-47ab-b7ce-a3fd6475d84b" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_54fc8e4a-b17a-42cd-87c0-eab4117b1e9d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_77a96758-53b2-4ad2-a88f-8791e5f588de" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_29fddd9b-c5f6-47ab-b7ce-a3fd6475d84b" xlink:to="loc_us-gaap_NoncontrollingInterestMember_77a96758-53b2-4ad2-a88f-8791e5f588de" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/BasisofPresentationDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#BasisofPresentationDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/BasisofPresentationDetails" xlink:type="extended" id="i03b05ec1d3e34b32a2598b4795647052_BasisofPresentationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_rtx_BasisOfPresentationLineItems_f27f9ab3-5c6d-4de4-a554-37df1343f7f8" xlink:href="rtx-20220630.xsd#rtx_BasisOfPresentationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_ChargesAsAResultOfRussiaSanctionsAndExportControlsGross_4d646f03-91d8-4511-9bfe-725788396f89" xlink:href="rtx-20220630.xsd#rtx_ChargesAsAResultOfRussiaSanctionsAndExportControlsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_BasisOfPresentationLineItems_f27f9ab3-5c6d-4de4-a554-37df1343f7f8" xlink:to="loc_rtx_ChargesAsAResultOfRussiaSanctionsAndExportControlsGross_4d646f03-91d8-4511-9bfe-725788396f89" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_ChargesAsAResultOfRussiaSanctionsAndExportControlsNetOfTax_c318d39f-5b9a-4d96-8aa3-65447b65ac1f" xlink:href="rtx-20220630.xsd#rtx_ChargesAsAResultOfRussiaSanctionsAndExportControlsNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_BasisOfPresentationLineItems_f27f9ab3-5c6d-4de4-a554-37df1343f7f8" xlink:to="loc_rtx_ChargesAsAResultOfRussiaSanctionsAndExportControlsNetOfTax_c318d39f-5b9a-4d96-8aa3-65447b65ac1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RemainingPerformanceObligationRPOReversal_193b2176-46d5-44f5-8db7-6240587aef5a" xlink:href="rtx-20220630.xsd#rtx_RemainingPerformanceObligationRPOReversal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_BasisOfPresentationLineItems_f27f9ab3-5c6d-4de4-a554-37df1343f7f8" xlink:to="loc_rtx_RemainingPerformanceObligationRPOReversal_193b2176-46d5-44f5-8db7-6240587aef5a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_BasisOfPresentationTable_61258e7a-b15c-4c56-9823-f0272c01daaa" xlink:href="rtx-20220630.xsd#rtx_BasisOfPresentationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_rtx_BasisOfPresentationLineItems_f27f9ab3-5c6d-4de4-a554-37df1343f7f8" xlink:to="loc_rtx_BasisOfPresentationTable_61258e7a-b15c-4c56-9823-f0272c01daaa" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_3a3007f4-681c-439c-9b4b-c90ccaaf34fc" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_rtx_BasisOfPresentationTable_61258e7a-b15c-4c56-9823-f0272c01daaa" xlink:to="loc_srt_StatementScenarioAxis_3a3007f4-681c-439c-9b4b-c90ccaaf34fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_3a3007f4-681c-439c-9b4b-c90ccaaf34fc_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_3a3007f4-681c-439c-9b4b-c90ccaaf34fc" xlink:to="loc_srt_ScenarioUnspecifiedDomain_3a3007f4-681c-439c-9b4b-c90ccaaf34fc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_7145e07a-86ee-43e8-9d81-72180f5b5c87" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_3a3007f4-681c-439c-9b4b-c90ccaaf34fc" xlink:to="loc_srt_ScenarioUnspecifiedDomain_7145e07a-86ee-43e8-9d81-72180f5b5c87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RussiaSanctionsImpactOnPrattWhitneyAndCollinsMember_47188208-4a8d-4dc0-b6e5-7c8aeb326709" xlink:href="rtx-20220630.xsd#rtx_RussiaSanctionsImpactOnPrattWhitneyAndCollinsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_7145e07a-86ee-43e8-9d81-72180f5b5c87" xlink:to="loc_rtx_RussiaSanctionsImpactOnPrattWhitneyAndCollinsMember_47188208-4a8d-4dc0-b6e5-7c8aeb326709" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RPORelatedToOurSalesContractsInRussiaMember_8acf95a6-2de3-4261-a9be-197763a763da" xlink:href="rtx-20220630.xsd#rtx_RPORelatedToOurSalesContractsInRussiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_7145e07a-86ee-43e8-9d81-72180f5b5c87" xlink:to="loc_rtx_RPORelatedToOurSalesContractsInRussiaMember_8acf95a6-2de3-4261-a9be-197763a763da" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/AcquisitionsDispositionsGoodwillandIntangibleAssetsTables" xlink:type="simple" xlink:href="rtx-20220630.xsd#AcquisitionsDispositionsGoodwillandIntangibleAssetsTables"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/AcquisitionsDispositionsGoodwillandIntangibleAssetsTables" xlink:type="extended" id="i65340a6b7e764d9593137695832ee3ac_AcquisitionsDispositionsGoodwillandIntangibleAssetsTables">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentLineItems_c7c67c2c-3277-40c2-bf3d-4ebd2a4457d7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTextBlock_5f2b775c-9d8f-4d65-afc2-35ebbc4ce00f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfGoodwillTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentLineItems_c7c67c2c-3277-40c2-bf3d-4ebd2a4457d7" xlink:to="loc_us-gaap_ScheduleOfGoodwillTextBlock_5f2b775c-9d8f-4d65-afc2-35ebbc4ce00f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTableTextBlock_fa30ced9-dfd1-4215-8b04-ea9b6cff6c80" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentLineItems_c7c67c2c-3277-40c2-bf3d-4ebd2a4457d7" xlink:to="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTableTextBlock_fa30ced9-dfd1-4215-8b04-ea9b6cff6c80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_42b9833c-5b88-4745-ad21-d72ce8287ca9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentLineItems_c7c67c2c-3277-40c2-bf3d-4ebd2a4457d7" xlink:to="loc_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_42b9833c-5b88-4745-ad21-d72ce8287ca9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentsTable_11c42066-5f1f-4c7e-96ae-1fd50d255a23" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentLineItems_c7c67c2c-3277-40c2-bf3d-4ebd2a4457d7" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentsTable_11c42066-5f1f-4c7e-96ae-1fd50d255a23" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_5a722bbf-401d-4b12-8c26-6514a8366fb4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentsTable_11c42066-5f1f-4c7e-96ae-1fd50d255a23" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_5a722bbf-401d-4b12-8c26-6514a8366fb4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_5a722bbf-401d-4b12-8c26-6514a8366fb4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_5a722bbf-401d-4b12-8c26-6514a8366fb4" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_5a722bbf-401d-4b12-8c26-6514a8366fb4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f934740e-e0db-45d7-9d77-0e2164e4e758" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_5a722bbf-401d-4b12-8c26-6514a8366fb4" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f934740e-e0db-45d7-9d77-0e2164e4e758" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/AcquisitionsDispositionsGoodwillandIntangibleAssetsGeneralInformationDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#AcquisitionsDispositionsGoodwillandIntangibleAssetsGeneralInformationDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/AcquisitionsDispositionsGoodwillandIntangibleAssetsGeneralInformationDetails" xlink:type="extended" id="i0fa4e4c8c772451389875bdf90f8d4af_AcquisitionsDispositionsGoodwillandIntangibleAssetsGeneralInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_26d9f3be-58b9-46ab-930e-a605af446292" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates_c31fb32e-9ba8-4310-bc8d-e942cd3c9d0a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_26d9f3be-58b9-46ab-930e-a605af446292" xlink:to="loc_us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates_c31fb32e-9ba8-4310-bc8d-e942cd3c9d0a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_06378c00-d1db-48e7-83cd-1e81639b61a0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_26d9f3be-58b9-46ab-930e-a605af446292" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_06378c00-d1db-48e7-83cd-1e81639b61a0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_d98d3349-63c1-4543-bb8a-44d8b1411c82" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_06378c00-d1db-48e7-83cd-1e81639b61a0" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_d98d3349-63c1-4543-bb8a-44d8b1411c82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_d98d3349-63c1-4543-bb8a-44d8b1411c82_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_d98d3349-63c1-4543-bb8a-44d8b1411c82" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_d98d3349-63c1-4543-bb8a-44d8b1411c82_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_363e0849-def1-41b8-935e-5a159154cbed" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_d98d3349-63c1-4543-bb8a-44d8b1411c82" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_363e0849-def1-41b8-935e-5a159154cbed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_8f7b1938-edcd-4cb5-9f48-187026d8f64c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_363e0849-def1-41b8-935e-5a159154cbed" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_8f7b1938-edcd-4cb5-9f48-187026d8f64c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_ceb1ee65-6bce-4c53-bdbb-d5d3dc3e1920" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_363e0849-def1-41b8-935e-5a159154cbed" xlink:to="loc_us-gaap_CustomerRelationshipsMember_ceb1ee65-6bce-4c53-bdbb-d5d3dc3e1920" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4152445b-c5b1-4549-b357-b8bada626e93" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_06378c00-d1db-48e7-83cd-1e81639b61a0" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4152445b-c5b1-4549-b357-b8bada626e93" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_4152445b-c5b1-4549-b357-b8bada626e93_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4152445b-c5b1-4549-b357-b8bada626e93" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_4152445b-c5b1-4549-b357-b8bada626e93_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_0e994e84-3683-4fe8-9e34-9e7e4ab93fcc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4152445b-c5b1-4549-b357-b8bada626e93" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_0e994e84-3683-4fe8-9e34-9e7e4ab93fcc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_ForcepointMember_e76e4c55-7e28-4883-85d0-1bd0b481b85b" xlink:href="rtx-20220630.xsd#rtx_ForcepointMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_0e994e84-3683-4fe8-9e34-9e7e4ab93fcc" xlink:to="loc_rtx_ForcepointMember_e76e4c55-7e28-4883-85d0-1bd0b481b85b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/AcquisitionDispositionsGoodwillandIntangibleAssetsGoodwillDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#AcquisitionDispositionsGoodwillandIntangibleAssetsGoodwillDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/AcquisitionDispositionsGoodwillandIntangibleAssetsGoodwillDetails" xlink:type="extended" id="i3f0591098b404279a56d9b4bf4821959_AcquisitionDispositionsGoodwillandIntangibleAssetsGoodwillDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_e52d69e3-2ae1-45af-bdc6-7848f130595a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_cb241645-714c-428e-bc71-53bdec852a24" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_e52d69e3-2ae1-45af-bdc6-7848f130595a" xlink:to="loc_us-gaap_Goodwill_cb241645-714c-428e-bc71-53bdec852a24" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_ed5f42c2-e5c3-4a5c-9242-51daa5fac556" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GoodwillAcquiredDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_e52d69e3-2ae1-45af-bdc6-7848f130595a" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_ed5f42c2-e5c3-4a5c-9242-51daa5fac556" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Goodwilltranslationandotherincreasedecrease_edc6597f-3f23-45ee-b695-6630dfe8a21a" xlink:href="rtx-20220630.xsd#rtx_Goodwilltranslationandotherincreasedecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_e52d69e3-2ae1-45af-bdc6-7848f130595a" xlink:to="loc_rtx_Goodwilltranslationandotherincreasedecrease_edc6597f-3f23-45ee-b695-6630dfe8a21a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_fd9ea47a-ab32-40ce-95bf-cca5912270aa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Goodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_c4b23240-ea01-43ea-bad0-24c14bc6ddec" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_e52d69e3-2ae1-45af-bdc6-7848f130595a" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_c4b23240-ea01-43ea-bad0-24c14bc6ddec" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_61918106-a7b2-4455-ab3c-d659af3f156c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_c4b23240-ea01-43ea-bad0-24c14bc6ddec" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_61918106-a7b2-4455-ab3c-d659af3f156c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_61918106-a7b2-4455-ab3c-d659af3f156c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_61918106-a7b2-4455-ab3c-d659af3f156c" xlink:to="loc_us-gaap_SegmentDomain_61918106-a7b2-4455-ab3c-d659af3f156c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_ecff19d0-a06a-47f5-8ad6-670f1dbc503a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_61918106-a7b2-4455-ab3c-d659af3f156c" xlink:to="loc_us-gaap_SegmentDomain_ecff19d0-a06a-47f5-8ad6-670f1dbc503a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_CollinsAerospaceSystemsMember_1de804eb-b4d4-4680-b250-1eaed342bf59" xlink:href="rtx-20220630.xsd#rtx_CollinsAerospaceSystemsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ecff19d0-a06a-47f5-8ad6-670f1dbc503a" xlink:to="loc_rtx_CollinsAerospaceSystemsMember_1de804eb-b4d4-4680-b250-1eaed342bf59" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_PrattAndWhitneyMember_829d7c5c-a463-49aa-9b61-b0b8a8f0435a" xlink:href="rtx-20220630.xsd#rtx_PrattAndWhitneyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ecff19d0-a06a-47f5-8ad6-670f1dbc503a" xlink:to="loc_rtx_PrattAndWhitneyMember_829d7c5c-a463-49aa-9b61-b0b8a8f0435a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RaytheonIntelligenceSpaceMember_ba1e4476-df9b-4a3e-915b-d0fb00e7a97d" xlink:href="rtx-20220630.xsd#rtx_RaytheonIntelligenceSpaceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ecff19d0-a06a-47f5-8ad6-670f1dbc503a" xlink:to="loc_rtx_RaytheonIntelligenceSpaceMember_ba1e4476-df9b-4a3e-915b-d0fb00e7a97d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RaytheonMissilesDefenseMember_6c9035cf-a59b-47e3-84c1-b51d7c267f5d" xlink:href="rtx-20220630.xsd#rtx_RaytheonMissilesDefenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ecff19d0-a06a-47f5-8ad6-670f1dbc503a" xlink:to="loc_rtx_RaytheonMissilesDefenseMember_6c9035cf-a59b-47e3-84c1-b51d7c267f5d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_TotalSegmentsMember_cb7b84ea-f6f8-454b-baf3-65c036e16cce" xlink:href="rtx-20220630.xsd#rtx_TotalSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ecff19d0-a06a-47f5-8ad6-670f1dbc503a" xlink:to="loc_rtx_TotalSegmentsMember_cb7b84ea-f6f8-454b-baf3-65c036e16cce" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_EliminationsAndOtherMember_db447b85-ab91-4881-b23f-ad5b658e3651" xlink:href="rtx-20220630.xsd#rtx_EliminationsAndOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ecff19d0-a06a-47f5-8ad6-670f1dbc503a" xlink:to="loc_rtx_EliminationsAndOtherMember_db447b85-ab91-4881-b23f-ad5b658e3651" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/AcquisitionsDispositionsGoodwillandIntangibleAssetsIntangibleAssetsDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#AcquisitionsDispositionsGoodwillandIntangibleAssetsIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/AcquisitionsDispositionsGoodwillandIntangibleAssetsIntangibleAssetsDetails" xlink:type="extended" id="ie490a19287ac4e2fb0f344ff78b3197c_AcquisitionsDispositionsGoodwillandIntangibleAssetsIntangibleAssetsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_9a281f26-faa5-419d-8951-b7615d372dfa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_30d5e7fa-e9bf-4ffa-9dcf-bcca2bfc07cb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_9a281f26-faa5-419d-8951-b7615d372dfa" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_30d5e7fa-e9bf-4ffa-9dcf-bcca2bfc07cb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_de43ffae-31fe-40ab-bd00-b99b43d3a35b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_9a281f26-faa5-419d-8951-b7615d372dfa" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_de43ffae-31fe-40ab-bd00-b99b43d3a35b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_e0404885-b0e4-4fa6-8b04-8d398ecb72c2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_9a281f26-faa5-419d-8951-b7615d372dfa" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_e0404885-b0e4-4fa6-8b04-8d398ecb72c2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_a7fe1ad3-4b5f-4952-8277-78981777eb87" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_9a281f26-faa5-419d-8951-b7615d372dfa" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_a7fe1ad3-4b5f-4952-8277-78981777eb87" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_60739f54-d6b4-4e0e-9f5d-fba1ae381609" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_9a281f26-faa5-419d-8951-b7615d372dfa" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_60739f54-d6b4-4e0e-9f5d-fba1ae381609" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_34e21df5-6f3e-4058-8bcc-237fab3e16f3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_60739f54-d6b4-4e0e-9f5d-fba1ae381609" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_34e21df5-6f3e-4058-8bcc-237fab3e16f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_34e21df5-6f3e-4058-8bcc-237fab3e16f3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_34e21df5-6f3e-4058-8bcc-237fab3e16f3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_34e21df5-6f3e-4058-8bcc-237fab3e16f3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c6f50c83-23af-44b6-a95f-2f2e3ee3fd5d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_34e21df5-6f3e-4058-8bcc-237fab3e16f3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c6f50c83-23af-44b6-a95f-2f2e3ee3fd5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_CollaborationMember_24d477ae-b5db-490f-b9ad-86d5045f2b87" xlink:href="rtx-20220630.xsd#rtx_CollaborationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c6f50c83-23af-44b6-a95f-2f2e3ee3fd5d" xlink:to="loc_rtx_CollaborationMember_24d477ae-b5db-490f-b9ad-86d5045f2b87" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_ExclusivityAssetsMember_42c7177d-7bd3-49e5-8185-e1cf09cd901c" xlink:href="rtx-20220630.xsd#rtx_ExclusivityAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c6f50c83-23af-44b6-a95f-2f2e3ee3fd5d" xlink:to="loc_rtx_ExclusivityAssetsMember_42c7177d-7bd3-49e5-8185-e1cf09cd901c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_81b6dfd7-d9e9-405c-a27f-04d69654d370" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c6f50c83-23af-44b6-a95f-2f2e3ee3fd5d" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_81b6dfd7-d9e9-405c-a27f-04d69654d370" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_cfb48359-e67d-48a7-b1a0-4fddc8422d83" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c6f50c83-23af-44b6-a95f-2f2e3ee3fd5d" xlink:to="loc_us-gaap_CustomerRelationshipsMember_cfb48359-e67d-48a7-b1a0-4fddc8422d83" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/DiscontinuedOperationDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#DiscontinuedOperationDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/DiscontinuedOperationDetails" xlink:type="extended" id="i0ddd123ed6d745e0b27477ac079b250c_DiscontinuedOperationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_2261a321-ed35-43b7-9bef-d3c6e5f35c00" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_3abf7a3c-91c2-448e-83d9-e492b14fe5f8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_2261a321-ed35-43b7-9bef-d3c6e5f35c00" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_3abf7a3c-91c2-448e-83d9-e492b14fe5f8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_0f88bfb0-f034-401f-ad83-545b9919fc91" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_3abf7a3c-91c2-448e-83d9-e492b14fe5f8" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_0f88bfb0-f034-401f-ad83-545b9919fc91" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_0f88bfb0-f034-401f-ad83-545b9919fc91_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_0f88bfb0-f034-401f-ad83-545b9919fc91" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_0f88bfb0-f034-401f-ad83-545b9919fc91_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_cf44848f-e322-440f-b1e3-f5fd93b9a08a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_0f88bfb0-f034-401f-ad83-545b9919fc91" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_cf44848f-e322-440f-b1e3-f5fd93b9a08a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_6220ef4a-b8da-4450-973d-477e7ae72e3b" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_3abf7a3c-91c2-448e-83d9-e492b14fe5f8" xlink:to="loc_srt_ProductOrServiceAxis_6220ef4a-b8da-4450-973d-477e7ae72e3b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_6220ef4a-b8da-4450-973d-477e7ae72e3b_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_6220ef4a-b8da-4450-973d-477e7ae72e3b" xlink:to="loc_srt_ProductsAndServicesDomain_6220ef4a-b8da-4450-973d-477e7ae72e3b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_67bd474d-deb6-4ca8-9b71-1d317da653bc" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_6220ef4a-b8da-4450-973d-477e7ae72e3b" xlink:to="loc_srt_ProductsAndServicesDomain_67bd474d-deb6-4ca8-9b71-1d317da653bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_b2a32f61-12fb-4e9b-a291-2c7256b832b0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_3abf7a3c-91c2-448e-83d9-e492b14fe5f8" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_b2a32f61-12fb-4e9b-a291-2c7256b832b0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_b2a32f61-12fb-4e9b-a291-2c7256b832b0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_b2a32f61-12fb-4e9b-a291-2c7256b832b0" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_b2a32f61-12fb-4e9b-a291-2c7256b832b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_2dc829eb-52bb-4527-b8c4-7b5447bcc8da" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_b2a32f61-12fb-4e9b-a291-2c7256b832b0" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_2dc829eb-52bb-4527-b8c4-7b5447bcc8da" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/ChangesinContractEstimatesatCompletionScheduleofChangeinAccountingEstimateDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#ChangesinContractEstimatesatCompletionScheduleofChangeinAccountingEstimateDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/ChangesinContractEstimatesatCompletionScheduleofChangeinAccountingEstimateDetails" xlink:type="extended" id="i6709f35917854973a851846c4a793157_ChangesinContractEstimatesatCompletionScheduleofChangeinAccountingEstimateDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ChangeInAccountingEstimateLineItems_d59f2f2c-5e6c-4120-9b12-bbe52bee9479" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ChangeInAccountingEstimateLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod_9dd46a47-f202-4024-8b60-caa2e09e06a8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ChangeInAccountingEstimateLineItems_d59f2f2c-5e6c-4120-9b12-bbe52bee9479" xlink:to="loc_us-gaap_ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod_9dd46a47-f202-4024-8b60-caa2e09e06a8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_845ae388-394d-4fa1-8642-8a9027f55181" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ChangeInAccountingEstimateLineItems_d59f2f2c-5e6c-4120-9b12-bbe52bee9479" xlink:to="loc_us-gaap_OperatingIncomeLoss_845ae388-394d-4fa1-8642-8a9027f55181" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperations_414e1ab8-18c9-4f6d-b7e2-b836a2f9cc45" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ChangeInAccountingEstimateLineItems_d59f2f2c-5e6c-4120-9b12-bbe52bee9479" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperations_414e1ab8-18c9-4f6d-b7e2-b836a2f9cc45" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_6b9eede0-58fd-4c42-879d-2dd758728c16" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ChangeInAccountingEstimateLineItems_d59f2f2c-5e6c-4120-9b12-bbe52bee9479" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_6b9eede0-58fd-4c42-879d-2dd758728c16" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfChangeInAccountingEstimateTable_c78c0625-d53b-4a75-bc03-79e98d3da6bb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfChangeInAccountingEstimateTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ChangeInAccountingEstimateLineItems_d59f2f2c-5e6c-4120-9b12-bbe52bee9479" xlink:to="loc_us-gaap_ScheduleOfChangeInAccountingEstimateTable_c78c0625-d53b-4a75-bc03-79e98d3da6bb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_2426165c-4180-4e38-8f1c-243a69c1f4b4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ChangeInAccountingEstimateByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfChangeInAccountingEstimateTable_c78c0625-d53b-4a75-bc03-79e98d3da6bb" xlink:to="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_2426165c-4180-4e38-8f1c-243a69c1f4b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_2426165c-4180-4e38-8f1c-243a69c1f4b4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ChangeInAccountingEstimateTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_2426165c-4180-4e38-8f1c-243a69c1f4b4" xlink:to="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_2426165c-4180-4e38-8f1c-243a69c1f4b4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_3ec4c5a3-f201-423b-95ad-87ff71c4d7a4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ChangeInAccountingEstimateTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_2426165c-4180-4e38-8f1c-243a69c1f4b4" xlink:to="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_3ec4c5a3-f201-423b-95ad-87ff71c4d7a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractsAccountedForUnderPercentageOfCompletionMember_2a4faa7c-50d3-4a76-ba02-85d5bd48581e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractsAccountedForUnderPercentageOfCompletionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_3ec4c5a3-f201-423b-95ad-87ff71c4d7a4" xlink:to="loc_us-gaap_ContractsAccountedForUnderPercentageOfCompletionMember_2a4faa7c-50d3-4a76-ba02-85d5bd48581e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/ContractAssetandLiabilityDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#ContractAssetandLiabilityDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/ContractAssetandLiabilityDetails" xlink:type="extended" id="ia250393c54464d8991a1805d79edbb58_ContractAssetandLiabilityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RevenueFromContractWithCustomerLineItems_d5abc632-8a93-40b8-acc7-04dacaf8fed4" xlink:href="rtx-20220630.xsd#rtx_RevenueFromContractWithCustomerLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNetCurrent_5dc997f1-5a3e-414d-96e1-f94bc54b62d5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerAssetNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_RevenueFromContractWithCustomerLineItems_d5abc632-8a93-40b8-acc7-04dacaf8fed4" xlink:to="loc_us-gaap_ContractWithCustomerAssetNetCurrent_5dc997f1-5a3e-414d-96e1-f94bc54b62d5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_02a2d812-a550-4be0-891c-16e1a04ea08a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_RevenueFromContractWithCustomerLineItems_d5abc632-8a93-40b8-acc7-04dacaf8fed4" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_02a2d812-a550-4be0-891c-16e1a04ea08a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_ContractsWithCustomerAssetAndLiabilitiesNet_e6360fc3-019b-4227-b58a-178e59daa5b1" xlink:href="rtx-20220630.xsd#rtx_ContractsWithCustomerAssetAndLiabilitiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_RevenueFromContractWithCustomerLineItems_d5abc632-8a93-40b8-acc7-04dacaf8fed4" xlink:to="loc_rtx_ContractsWithCustomerAssetAndLiabilitiesNet_e6360fc3-019b-4227-b58a-178e59daa5b1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_ContractwithCustomerAssetChange_4c5d5963-6baa-48d8-8ce4-70dcc64a006c" xlink:href="rtx-20220630.xsd#rtx_ContractwithCustomerAssetChange"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_RevenueFromContractWithCustomerLineItems_d5abc632-8a93-40b8-acc7-04dacaf8fed4" xlink:to="loc_rtx_ContractwithCustomerAssetChange_4c5d5963-6baa-48d8-8ce4-70dcc64a006c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_ContractWithCustomerLiabilityChange_50dc216a-8d5c-4204-9a60-3811a43ba3e3" xlink:href="rtx-20220630.xsd#rtx_ContractWithCustomerLiabilityChange"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_RevenueFromContractWithCustomerLineItems_d5abc632-8a93-40b8-acc7-04dacaf8fed4" xlink:to="loc_rtx_ContractWithCustomerLiabilityChange_50dc216a-8d5c-4204-9a60-3811a43ba3e3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_64cd835c-ff52-4106-a93b-d5b5746aece4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_RevenueFromContractWithCustomerLineItems_d5abc632-8a93-40b8-acc7-04dacaf8fed4" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_64cd835c-ff52-4106-a93b-d5b5746aece4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_AdvancesReceivedToDateOnContractsRelatedToPrecisionGuidedMunitionsToCertainMiddleEasternCustomersPendingUSGovernmentApproval_9b1cfd73-a3f4-4140-ae91-2b8812d7be81" xlink:href="rtx-20220630.xsd#rtx_AdvancesReceivedToDateOnContractsRelatedToPrecisionGuidedMunitionsToCertainMiddleEasternCustomersPendingUSGovernmentApproval"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_RevenueFromContractWithCustomerLineItems_d5abc632-8a93-40b8-acc7-04dacaf8fed4" xlink:to="loc_rtx_AdvancesReceivedToDateOnContractsRelatedToPrecisionGuidedMunitionsToCertainMiddleEasternCustomersPendingUSGovernmentApproval_9b1cfd73-a3f4-4140-ae91-2b8812d7be81" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetAccumulatedAllowanceForCreditLoss_facd9e7a-7657-4ad7-8d5c-64b5b8de6c6a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerAssetAccumulatedAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_RevenueFromContractWithCustomerLineItems_d5abc632-8a93-40b8-acc7-04dacaf8fed4" xlink:to="loc_us-gaap_ContractWithCustomerAssetAccumulatedAllowanceForCreditLoss_facd9e7a-7657-4ad7-8d5c-64b5b8de6c6a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_ContractAssetAndLiabilityTable_6ec9ac1b-186d-4e53-983c-a9fb93da0689" xlink:href="rtx-20220630.xsd#rtx_ContractAssetAndLiabilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_rtx_RevenueFromContractWithCustomerLineItems_d5abc632-8a93-40b8-acc7-04dacaf8fed4" xlink:to="loc_rtx_ContractAssetAndLiabilityTable_6ec9ac1b-186d-4e53-983c-a9fb93da0689" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_d59b8c00-06c8-4ab7-a7c8-4f2713990860" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_rtx_ContractAssetAndLiabilityTable_6ec9ac1b-186d-4e53-983c-a9fb93da0689" xlink:to="loc_srt_StatementScenarioAxis_d59b8c00-06c8-4ab7-a7c8-4f2713990860" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_d59b8c00-06c8-4ab7-a7c8-4f2713990860_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_d59b8c00-06c8-4ab7-a7c8-4f2713990860" xlink:to="loc_srt_ScenarioUnspecifiedDomain_d59b8c00-06c8-4ab7-a7c8-4f2713990860_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_55a98a50-9991-4c94-8b32-b4f4129ebd9b" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_d59b8c00-06c8-4ab7-a7c8-4f2713990860" xlink:to="loc_srt_ScenarioUnspecifiedDomain_55a98a50-9991-4c94-8b32-b4f4129ebd9b" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/BorrowingsandLinesofCreditShortTermBorrowingsDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#BorrowingsandLinesofCreditShortTermBorrowingsDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/BorrowingsandLinesofCreditShortTermBorrowingsDetails" xlink:type="extended" id="ia142377e2f6f43f3adf8c4b53df26d11_BorrowingsandLinesofCreditShortTermBorrowingsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtLineItems_0549551a-613a-465b-9acd-b600558697c8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShortTermDebtLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_9fb48b68-078e-4e82-b201-6f4d3d76e8b8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfShortTermDebtTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_0549551a-613a-465b-9acd-b600558697c8" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_9fb48b68-078e-4e82-b201-6f4d3d76e8b8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_77ce1223-df57-42e5-9a15-d6eeb88841c7" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_9fb48b68-078e-4e82-b201-6f4d3d76e8b8" xlink:to="loc_srt_StatementScenarioAxis_77ce1223-df57-42e5-9a15-d6eeb88841c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_77ce1223-df57-42e5-9a15-d6eeb88841c7_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_77ce1223-df57-42e5-9a15-d6eeb88841c7" xlink:to="loc_srt_ScenarioUnspecifiedDomain_77ce1223-df57-42e5-9a15-d6eeb88841c7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_dfcb7152-d05f-471c-9cac-6f13d776ab3d" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_77ce1223-df57-42e5-9a15-d6eeb88841c7" xlink:to="loc_srt_ScenarioUnspecifiedDomain_dfcb7152-d05f-471c-9cac-6f13d776ab3d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/BorrowingandLinesofCreditNarrativeDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#BorrowingandLinesofCreditNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/BorrowingandLinesofCreditNarrativeDetails" xlink:type="extended" id="i3927270d80c84ef5877d5af18a0116bc_BorrowingandLinesofCreditNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_53bec95e-9030-403f-8608-03c56073896d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_MaximumCommercialPaperBorrowingAuthority_5e330b58-28fe-47cd-8588-573fa078227d" xlink:href="rtx-20220630.xsd#rtx_MaximumCommercialPaperBorrowingAuthority"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_53bec95e-9030-403f-8608-03c56073896d" xlink:to="loc_rtx_MaximumCommercialPaperBorrowingAuthority_5e330b58-28fe-47cd-8588-573fa078227d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_2727f026-4af3-4a24-af90-869c0b5c787e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_53bec95e-9030-403f-8608-03c56073896d" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_2727f026-4af3-4a24-af90-869c0b5c787e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaper_19991351-467a-436e-9799-b971c79c0bb9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommercialPaper"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_53bec95e-9030-403f-8608-03c56073896d" xlink:to="loc_us-gaap_CommercialPaper_19991351-467a-436e-9799-b971c79c0bb9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_AggregateLineOfCreditFacilityMaximumBorrowingCapacity_abad2812-4e95-43c6-95dc-45d0caa72643" xlink:href="rtx-20220630.xsd#rtx_AggregateLineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_53bec95e-9030-403f-8608-03c56073896d" xlink:to="loc_rtx_AggregateLineOfCreditFacilityMaximumBorrowingCapacity_abad2812-4e95-43c6-95dc-45d0caa72643" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_b7617024-1450-4527-9928-12822baabde7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_53bec95e-9030-403f-8608-03c56073896d" xlink:to="loc_us-gaap_LineOfCredit_b7617024-1450-4527-9928-12822baabde7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfDebt_d9933e98-8069-48a3-ac12-edc213a14d6c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProceedsFromIssuanceOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_53bec95e-9030-403f-8608-03c56073896d" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfDebt_d9933e98-8069-48a3-ac12-edc213a14d6c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfDebt_dee1325b-f2af-4ffd-9850-479865f5c6c0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RepaymentsOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_53bec95e-9030-403f-8608-03c56073896d" xlink:to="loc_us-gaap_RepaymentsOfDebt_dee1325b-f2af-4ffd-9850-479865f5c6c0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_AverageYearsofMaturityofLongTermDebt_79773e37-6297-4a85-badf-2f717f1ba97a" xlink:href="rtx-20220630.xsd#rtx_AverageYearsofMaturityofLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_53bec95e-9030-403f-8608-03c56073896d" xlink:to="loc_rtx_AverageYearsofMaturityofLongTermDebt_79773e37-6297-4a85-badf-2f717f1ba97a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_0d3a1d4c-501a-496f-910e-5e07bc53b6c6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_53bec95e-9030-403f-8608-03c56073896d" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_0d3a1d4c-501a-496f-910e-5e07bc53b6c6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_b60b039d-5726-418f-8101-e7da44bc79a5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_0d3a1d4c-501a-496f-910e-5e07bc53b6c6" xlink:to="loc_us-gaap_CreditFacilityAxis_b60b039d-5726-418f-8101-e7da44bc79a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_b60b039d-5726-418f-8101-e7da44bc79a5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_b60b039d-5726-418f-8101-e7da44bc79a5" xlink:to="loc_us-gaap_CreditFacilityDomain_b60b039d-5726-418f-8101-e7da44bc79a5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_935f0d69-e363-4dda-aee2-4cffa01e193f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_b60b039d-5726-418f-8101-e7da44bc79a5" xlink:to="loc_us-gaap_CreditFacilityDomain_935f0d69-e363-4dda-aee2-4cffa01e193f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RevolvingCreditAgreementMember_8f56e351-b379-4ea1-936d-472707d5054f" xlink:href="rtx-20220630.xsd#rtx_RevolvingCreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_935f0d69-e363-4dda-aee2-4cffa01e193f" xlink:to="loc_rtx_RevolvingCreditAgreementMember_8f56e351-b379-4ea1-936d-472707d5054f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_A20BMayRevolvingCreditAgreementMember_7600ca8c-ab4f-4f3f-bd5e-14e6a339b7fd" xlink:href="rtx-20220630.xsd#rtx_A20BMayRevolvingCreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_935f0d69-e363-4dda-aee2-4cffa01e193f" xlink:to="loc_rtx_A20BMayRevolvingCreditAgreementMember_7600ca8c-ab4f-4f3f-bd5e-14e6a339b7fd" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/BorrowingsandLinesofCreditLongTermDebtDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#BorrowingsandLinesofCreditLongTermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/BorrowingsandLinesofCreditLongTermDebtDetails" xlink:type="extended" id="iafa334f001514daa8425562433c45972_BorrowingsandLinesofCreditLongTermDebtDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_a9c9257e-0711-465c-835f-c5702a1b63f0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfDebt_5d8c9bdf-9ee2-4afd-9792-be77762ab226" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RepaymentsOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_a9c9257e-0711-465c-835f-c5702a1b63f0" xlink:to="loc_us-gaap_RepaymentsOfDebt_5d8c9bdf-9ee2-4afd-9792-be77762ab226" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_af09056c-44f6-49b7-ad4d-3ae3b946b859" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_a9c9257e-0711-465c-835f-c5702a1b63f0" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_af09056c-44f6-49b7-ad4d-3ae3b946b859" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentMaturityDateDescription_ae696dd8-c491-4d96-a891-6dff1d3d7934" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentMaturityDateDescription"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_a9c9257e-0711-465c-835f-c5702a1b63f0" xlink:to="loc_us-gaap_DebtInstrumentMaturityDateDescription_ae696dd8-c491-4d96-a891-6dff1d3d7934" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_825d28ed-119d-4965-8f56-8698ec01face" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_a9c9257e-0711-465c-835f-c5702a1b63f0" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_825d28ed-119d-4965-8f56-8698ec01face" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLongTermDebt_e12e306b-aa1a-46c5-a823-214bff21f39b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_a9c9257e-0711-465c-835f-c5702a1b63f0" xlink:to="loc_us-gaap_OtherLongTermDebt_e12e306b-aa1a-46c5-a823-214bff21f39b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_fd94867d-7019-4163-aa47-0f7bb3bfc01f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_a9c9257e-0711-465c-835f-c5702a1b63f0" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_fd94867d-7019-4163-aa47-0f7bb3bfc01f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_5a3e7810-b172-44e2-a1b7-a44f112c53b8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_a9c9257e-0711-465c-835f-c5702a1b63f0" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_5a3e7810-b172-44e2-a1b7-a44f112c53b8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_53b64053-43a6-4fbe-ae37-76d882edfe19" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_a9c9257e-0711-465c-835f-c5702a1b63f0" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_53b64053-43a6-4fbe-ae37-76d882edfe19" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_3f1ce1c9-fad0-4c32-9ae9-90dd0f1d70f2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_a9c9257e-0711-465c-835f-c5702a1b63f0" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_3f1ce1c9-fad0-4c32-9ae9-90dd0f1d70f2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_6088769c-8bee-4335-a701-9197f2ba7fae" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_a9c9257e-0711-465c-835f-c5702a1b63f0" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_6088769c-8bee-4335-a701-9197f2ba7fae" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_7983d9e6-9189-483a-b2e7-6995c4d5f739" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_a9c9257e-0711-465c-835f-c5702a1b63f0" xlink:to="loc_us-gaap_DebtInstrumentTable_7983d9e6-9189-483a-b2e7-6995c4d5f739" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_5412765a-0176-499a-a883-995db86a4bdb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_7983d9e6-9189-483a-b2e7-6995c4d5f739" xlink:to="loc_us-gaap_DebtInstrumentAxis_5412765a-0176-499a-a883-995db86a4bdb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_5412765a-0176-499a-a883-995db86a4bdb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_5412765a-0176-499a-a883-995db86a4bdb" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_5412765a-0176-499a-a883-995db86a4bdb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_5412765a-0176-499a-a883-995db86a4bdb" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes8750Due2021Member_d0e82550-8ebe-427c-8bb9-6b9d7f45a74a" xlink:href="rtx-20220630.xsd#rtx_Notes8750Due2021Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes8750Due2021Member_d0e82550-8ebe-427c-8bb9-6b9d7f45a74a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes3.650Due2023Member_0816917e-906b-4d83-be30-16fbef91c270" xlink:href="rtx-20220630.xsd#rtx_Notes3.650Due2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes3.650Due2023Member_0816917e-906b-4d83-be30-16fbef91c270" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes3.700Due2023Member_06b87c60-4d07-468a-954f-cc0c57004d20" xlink:href="rtx-20220630.xsd#rtx_Notes3.700Due2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes3.700Due2023Member_06b87c60-4d07-468a-954f-cc0c57004d20" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes3.200Due2024Member_1badb851-30ef-4eec-a408-c0a87f4d2e47" xlink:href="rtx-20220630.xsd#rtx_Notes3.200Due2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes3.200Due2024Member_1badb851-30ef-4eec-a408-c0a87f4d2e47" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes3150Due2024Member_39e41dbd-8e96-4fc7-9f44-5b771ebc6ef0" xlink:href="rtx-20220630.xsd#rtx_Notes3150Due2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes3150Due2024Member_39e41dbd-8e96-4fc7-9f44-5b771ebc6ef0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes3.950Due2025Member_6754c3ff-7319-41cc-ae6c-06a43e4ef0b3" xlink:href="rtx-20220630.xsd#rtx_Notes3.950Due2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes3.950Due2025Member_6754c3ff-7319-41cc-ae6c-06a43e4ef0b3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes2.650Due2026Member_fd7e0b8f-2019-4ae6-8641-fc78a2fc3772" xlink:href="rtx-20220630.xsd#rtx_Notes2.650Due2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes2.650Due2026Member_fd7e0b8f-2019-4ae6-8641-fc78a2fc3772" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes3.125Due2027Member_1fbdb98f-d6c4-4fea-a84d-7726fb378372" xlink:href="rtx-20220630.xsd#rtx_Notes3.125Due2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes3.125Due2027Member_1fbdb98f-d6c4-4fea-a84d-7726fb378372" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes3.500Due2027Member_4a84847b-5098-469d-a51e-45d820c9f07e" xlink:href="rtx-20220630.xsd#rtx_Notes3.500Due2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes3.500Due2027Member_4a84847b-5098-469d-a51e-45d820c9f07e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes7200Due2027Member_f174daa0-742a-4884-9530-2f3be4391fe3" xlink:href="rtx-20220630.xsd#rtx_Notes7200Due2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes7200Due2027Member_f174daa0-742a-4884-9530-2f3be4391fe3" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes7100Due2027Member_2bd1ddc0-a0f0-46f6-b44d-96ba52b36aa1" xlink:href="rtx-20220630.xsd#rtx_Notes7100Due2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes7100Due2027Member_2bd1ddc0-a0f0-46f6-b44d-96ba52b36aa1" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes6700Due2028Member_37e3de70-a649-4760-b9c7-2e92eea2aa58" xlink:href="rtx-20220630.xsd#rtx_Notes6700Due2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes6700Due2028Member_37e3de70-a649-4760-b9c7-2e92eea2aa58" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes7000Due2028Member_998ad177-451d-4af9-8391-d671d4fdf07c" xlink:href="rtx-20220630.xsd#rtx_Notes7000Due2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes7000Due2028Member_998ad177-451d-4af9-8391-d671d4fdf07c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes4.125Due2028Member_065c33db-b0f5-478a-a5de-c5819334cc21" xlink:href="rtx-20220630.xsd#rtx_Notes4.125Due2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes4.125Due2028Member_065c33db-b0f5-478a-a5de-c5819334cc21" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes7500Due2029Member_934a4794-2c4f-4adc-bfc6-4b119dfa13bd" xlink:href="rtx-20220630.xsd#rtx_Notes7500Due2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes7500Due2029Member_934a4794-2c4f-4adc-bfc6-4b119dfa13bd" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes2.150Due2030Member_e527e547-c564-49b9-8047-2b83e72e105c" xlink:href="rtx-20220630.xsd#rtx_Notes2.150Due2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes2.150Due2030Member_e527e547-c564-49b9-8047-2b83e72e105c" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes2250Due2030Member_dc1655d9-b061-43ae-8d07-421ad5825f43" xlink:href="rtx-20220630.xsd#rtx_Notes2250Due2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes2250Due2030Member_dc1655d9-b061-43ae-8d07-421ad5825f43" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes1900Due2031Member_0244d7cb-296c-431e-8928-182f8126494e" xlink:href="rtx-20220630.xsd#rtx_Notes1900Due2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes1900Due2031Member_0244d7cb-296c-431e-8928-182f8126494e" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes2375Due2032Member_17c97f5c-42a3-4d87-a6c5-e28becb254d3" xlink:href="rtx-20220630.xsd#rtx_Notes2375Due2032Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes2375Due2032Member_17c97f5c-42a3-4d87-a6c5-e28becb254d3" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes5400Due2035Member_8268052c-55ab-4c5e-a44b-17d416a8ced4" xlink:href="rtx-20220630.xsd#rtx_Notes5400Due2035Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes5400Due2035Member_8268052c-55ab-4c5e-a44b-17d416a8ced4" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes6050Due2036Member_4f4d372a-e793-4b43-92de-ebe0b72a5fbf" xlink:href="rtx-20220630.xsd#rtx_Notes6050Due2036Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes6050Due2036Member_4f4d372a-e793-4b43-92de-ebe0b72a5fbf" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes6800Due2036Member_92bfb770-e1ea-4224-b0c3-beedc49d8719" xlink:href="rtx-20220630.xsd#rtx_Notes6800Due2036Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes6800Due2036Member_92bfb770-e1ea-4224-b0c3-beedc49d8719" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes7000Due2038Member_21e7ad09-f50d-4fe6-aee1-2179da02fc13" xlink:href="rtx-20220630.xsd#rtx_Notes7000Due2038Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes7000Due2038Member_21e7ad09-f50d-4fe6-aee1-2179da02fc13" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes6125Due2038Member_27001e52-bc3d-48ed-913a-0c90fdeb5a30" xlink:href="rtx-20220630.xsd#rtx_Notes6125Due2038Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes6125Due2038Member_27001e52-bc3d-48ed-913a-0c90fdeb5a30" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes4.450Due2038Member_d4b8dbe3-4b2f-4635-a547-84948400d2e8" xlink:href="rtx-20220630.xsd#rtx_Notes4.450Due2038Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes4.450Due2038Member_d4b8dbe3-4b2f-4635-a547-84948400d2e8" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes5700Due2040Member_d89d9115-6faf-4e4c-a9b7-a757b2a2f43a" xlink:href="rtx-20220630.xsd#rtx_Notes5700Due2040Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes5700Due2040Member_d89d9115-6faf-4e4c-a9b7-a757b2a2f43a" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes4875Due2040Member_a532b32f-c2ac-4b70-81cd-24d134f23cf0" xlink:href="rtx-20220630.xsd#rtx_Notes4875Due2040Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes4875Due2040Member_a532b32f-c2ac-4b70-81cd-24d134f23cf0" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes4700Due2041Member_fd853f4e-a81a-4d38-9230-6b88b9ba72b2" xlink:href="rtx-20220630.xsd#rtx_Notes4700Due2041Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes4700Due2041Member_fd853f4e-a81a-4d38-9230-6b88b9ba72b2" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes4500Due2042Member_9a12ed0e-43ae-460e-8884-4c92b13f563b" xlink:href="rtx-20220630.xsd#rtx_Notes4500Due2042Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes4500Due2042Member_9a12ed0e-43ae-460e-8884-4c92b13f563b" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes4.800Due2043Member_4c9f7282-1deb-48f6-9962-c4f896f231fc" xlink:href="rtx-20220630.xsd#rtx_Notes4.800Due2043Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes4.800Due2043Member_4c9f7282-1deb-48f6-9962-c4f896f231fc" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes4200Due2044Member_59da8c37-16ca-40f4-acdd-2b95b226308d" xlink:href="rtx-20220630.xsd#rtx_Notes4200Due2044Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes4200Due2044Member_59da8c37-16ca-40f4-acdd-2b95b226308d" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes4.150Due2045MemberMember_0d1357ea-5723-4109-8a56-b8fe4039eb9c" xlink:href="rtx-20220630.xsd#rtx_Notes4.150Due2045MemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes4.150Due2045MemberMember_0d1357ea-5723-4109-8a56-b8fe4039eb9c" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes3.750Due2046Member_ba454a1d-8428-4d9e-822f-27244ca69f3d" xlink:href="rtx-20220630.xsd#rtx_Notes3.750Due2046Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes3.750Due2046Member_ba454a1d-8428-4d9e-822f-27244ca69f3d" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes4.050Due2047Member_ec562a84-9ac0-400c-bd02-eed097721fb3" xlink:href="rtx-20220630.xsd#rtx_Notes4.050Due2047Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes4.050Due2047Member_ec562a84-9ac0-400c-bd02-eed097721fb3" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes4.350Due2047Member_738c1acf-19b4-42fa-8e0c-1601000989a5" xlink:href="rtx-20220630.xsd#rtx_Notes4.350Due2047Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes4.350Due2047Member_738c1acf-19b4-42fa-8e0c-1601000989a5" xlink:type="arc" order="34"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes4.625Due2048Member_e46f22a2-99dd-4303-9ec9-1bf73f51b569" xlink:href="rtx-20220630.xsd#rtx_Notes4.625Due2048Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes4.625Due2048Member_e46f22a2-99dd-4303-9ec9-1bf73f51b569" xlink:type="arc" order="35"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes3125Due2050Member_160f04a2-49e1-4e16-b1b7-c601dd14efde" xlink:href="rtx-20220630.xsd#rtx_Notes3125Due2050Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes3125Due2050Member_160f04a2-49e1-4e16-b1b7-c601dd14efde" xlink:type="arc" order="36"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes2820Due2051Member_d7ba7c39-63d9-45c5-aa08-1d2de15831a9" xlink:href="rtx-20220630.xsd#rtx_Notes2820Due2051Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes2820Due2051Member_d7ba7c39-63d9-45c5-aa08-1d2de15831a9" xlink:type="arc" order="37"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes3030Due2052Member_1f3f6a0c-6f99-4314-91b5-4973fc1d2e74" xlink:href="rtx-20220630.xsd#rtx_Notes3030Due2052Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7af368e4-daa3-4f83-b8f5-cd627cdf1f46" xlink:to="loc_rtx_Notes3030Due2052Member_1f3f6a0c-6f99-4314-91b5-4973fc1d2e74" xlink:type="arc" order="38"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/EmployeeBenefitPlansDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#EmployeeBenefitPlansDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/EmployeeBenefitPlansDetails" xlink:type="extended" id="i7654679208c9470b891106872872ede7_EmployeeBenefitPlansDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aea53d22-9ba4-476d-b7d9-3fc5714f178b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionContributions_6f1fff32-4e2b-455c-b7c5-8e943b6204de" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PensionContributions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aea53d22-9ba4-476d-b7d9-3fc5714f178b" xlink:to="loc_us-gaap_PensionContributions_6f1fff32-4e2b-455c-b7c5-8e943b6204de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitsPayments_3b9b3634-18de-44f7-935e-8e07aeb14884" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherPostretirementBenefitsPayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aea53d22-9ba4-476d-b7d9-3fc5714f178b" xlink:to="loc_us-gaap_OtherPostretirementBenefitsPayments_3b9b3634-18de-44f7-935e-8e07aeb14884" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_fa8dce9e-744c-4015-9c89-43a51c039b9a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedContributionPlanCostRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aea53d22-9ba4-476d-b7d9-3fc5714f178b" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_fa8dce9e-744c-4015-9c89-43a51c039b9a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_422992fa-f2cb-4496-8fa8-ee4604e27231" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aea53d22-9ba4-476d-b7d9-3fc5714f178b" xlink:to="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_422992fa-f2cb-4496-8fa8-ee4604e27231" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_f69fcdd6-2d41-458b-a863-f70b73752acc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aea53d22-9ba4-476d-b7d9-3fc5714f178b" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_f69fcdd6-2d41-458b-a863-f70b73752acc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent_f5dd91f6-9a67-466b-a6d7-1e4ce733df82" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aea53d22-9ba4-476d-b7d9-3fc5714f178b" xlink:to="loc_us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent_f5dd91f6-9a67-466b-a6d7-1e4ce733df82" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_8e90b1dd-bca6-4d82-a059-e4de2902883e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aea53d22-9ba4-476d-b7d9-3fc5714f178b" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_8e90b1dd-bca6-4d82-a059-e4de2902883e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_d131770b-7da6-4126-8abf-eaed2da71c17" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aea53d22-9ba4-476d-b7d9-3fc5714f178b" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_d131770b-7da6-4126-8abf-eaed2da71c17" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_711f742b-1501-4d00-b63e-babb3b26649e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aea53d22-9ba4-476d-b7d9-3fc5714f178b" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_711f742b-1501-4d00-b63e-babb3b26649e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_27e0bb03-eaf1-4fae-8e44-501a806837e1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aea53d22-9ba4-476d-b7d9-3fc5714f178b" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_27e0bb03-eaf1-4fae-8e44-501a806837e1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_48ed72e8-983f-4791-a84e-e7ba7625e221" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aea53d22-9ba4-476d-b7d9-3fc5714f178b" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_48ed72e8-983f-4791-a84e-e7ba7625e221" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1_9d9b29d1-82bd-41d8-a411-35ae2d5a2dc8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aea53d22-9ba4-476d-b7d9-3fc5714f178b" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1_9d9b29d1-82bd-41d8-a411-35ae2d5a2dc8" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent_f734e02a-d10e-4bf5-9227-423f0eff1064" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aea53d22-9ba4-476d-b7d9-3fc5714f178b" xlink:to="loc_us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent_f734e02a-d10e-4bf5-9227-423f0eff1064" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_ef6155b2-2aec-4d05-8947-ad55cf13d911" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aea53d22-9ba4-476d-b7d9-3fc5714f178b" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_ef6155b2-2aec-4d05-8947-ad55cf13d911" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketableSecuritiesCurrent_746e1b9f-4937-42af-af12-430f7c043c4a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MarketableSecuritiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aea53d22-9ba4-476d-b7d9-3fc5714f178b" xlink:to="loc_us-gaap_MarketableSecuritiesCurrent_746e1b9f-4937-42af-af12-430f7c043c4a" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_dee217ef-58f7-4849-ba23-6a2803d48023" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aea53d22-9ba4-476d-b7d9-3fc5714f178b" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_dee217ef-58f7-4849-ba23-6a2803d48023" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_f6174653-4861-40a4-8ca8-69938da81559" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_dee217ef-58f7-4849-ba23-6a2803d48023" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_f6174653-4861-40a4-8ca8-69938da81559" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_f6174653-4861-40a4-8ca8-69938da81559_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_f6174653-4861-40a4-8ca8-69938da81559" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_f6174653-4861-40a4-8ca8-69938da81559_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_f4d97544-ca40-4b94-b2e4-f71f0bf1734f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_f6174653-4861-40a4-8ca8-69938da81559" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_f4d97544-ca40-4b94-b2e4-f71f0bf1734f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_6201395d-f8c2-4951-8083-66e5e73f5df6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_f4d97544-ca40-4b94-b2e4-f71f0bf1734f" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_6201395d-f8c2-4951-8083-66e5e73f5df6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_e3a382c6-cdc3-4705-9390-323dbd7087fe" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_f4d97544-ca40-4b94-b2e4-f71f0bf1734f" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_e3a382c6-cdc3-4705-9390-323dbd7087fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember_cd001e7e-e2cc-4a48-8aad-c360ceb0b544" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_f4d97544-ca40-4b94-b2e4-f71f0bf1734f" xlink:to="loc_us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember_cd001e7e-e2cc-4a48-8aad-c360ceb0b544" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationAxis_2de4d5b5-b681-45aa-9d2e-1e77be42b337" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetirementPlanSponsorLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_dee217ef-58f7-4849-ba23-6a2803d48023" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationAxis_2de4d5b5-b681-45aa-9d2e-1e77be42b337" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_2de4d5b5-b681-45aa-9d2e-1e77be42b337_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetirementPlanSponsorLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_2de4d5b5-b681-45aa-9d2e-1e77be42b337" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_2de4d5b5-b681-45aa-9d2e-1e77be42b337_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_ccc44bed-675e-45da-9f7b-5ac411d03a4b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetirementPlanSponsorLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_2de4d5b5-b681-45aa-9d2e-1e77be42b337" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_ccc44bed-675e-45da-9f7b-5ac411d03a4b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignPlanMember_d3bf30d1-63de-496d-8266-29bae0062626" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationDomain_ccc44bed-675e-45da-9f7b-5ac411d03a4b" xlink:to="loc_us-gaap_ForeignPlanMember_d3bf30d1-63de-496d-8266-29bae0062626" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_eed6b915-be54-4c0d-a6c6-f1cb3a1e64a3" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationDomain_ccc44bed-675e-45da-9f7b-5ac411d03a4b" xlink:to="loc_country_US_eed6b915-be54-4c0d-a6c6-f1cb3a1e64a3" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/IncomeTaxesNarrativeDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#IncomeTaxesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/IncomeTaxesNarrativeDetails" xlink:type="extended" id="i36288d03988642028c6d825d4f50b30a_IncomeTaxesNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_a0bcc6b2-59e6-4c1e-adbb-60d82c936c75" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_9409d2ed-a2f3-46b8-bbf8-5ba93583e66e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_a0bcc6b2-59e6-4c1e-adbb-60d82c936c75" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_9409d2ed-a2f3-46b8-bbf8-5ba93583e66e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_IncrementalPercentagePointsRelatedToForeignDerivedIntangibleIncomeFDIIAndCapitalizationOfRDBenefit_84127aa5-1184-4e32-a60e-855ce07fa35f" xlink:href="rtx-20220630.xsd#rtx_IncrementalPercentagePointsRelatedToForeignDerivedIntangibleIncomeFDIIAndCapitalizationOfRDBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_a0bcc6b2-59e6-4c1e-adbb-60d82c936c75" xlink:to="loc_rtx_IncrementalPercentagePointsRelatedToForeignDerivedIntangibleIncomeFDIIAndCapitalizationOfRDBenefit_84127aa5-1184-4e32-a60e-855ce07fa35f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_EffectiveIncomeTaxRateReconciliationChangeInUKEnactedTaxRateAmount_54b8fb65-e6ca-4369-9b8f-b1287c02ddea" xlink:href="rtx-20220630.xsd#rtx_EffectiveIncomeTaxRateReconciliationChangeInUKEnactedTaxRateAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_a0bcc6b2-59e6-4c1e-adbb-60d82c936c75" xlink:to="loc_rtx_EffectiveIncomeTaxRateReconciliationChangeInUKEnactedTaxRateAmount_54b8fb65-e6ca-4369-9b8f-b1287c02ddea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationDispositionOfBusiness_59fce047-9979-4214-8160-565722535456" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxReconciliationDispositionOfBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_a0bcc6b2-59e6-4c1e-adbb-60d82c936c75" xlink:to="loc_us-gaap_IncomeTaxReconciliationDispositionOfBusiness_59fce047-9979-4214-8160-565722535456" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible_0292c8c4-0245-4185-b3bf-da685f4f2184" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_a0bcc6b2-59e6-4c1e-adbb-60d82c936c75" xlink:to="loc_us-gaap_DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible_0292c8c4-0245-4185-b3bf-da685f4f2184" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleTable_c97b529b-4903-43c4-8659-c056e4814073" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_a0bcc6b2-59e6-4c1e-adbb-60d82c936c75" xlink:to="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleTable_c97b529b-4903-43c4-8659-c056e4814073" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_5755b52f-1584-480b-ad20-d5024cf420d8" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleTable_c97b529b-4903-43c4-8659-c056e4814073" xlink:to="loc_srt_RangeAxis_5755b52f-1584-480b-ad20-d5024cf420d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_5755b52f-1584-480b-ad20-d5024cf420d8_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_5755b52f-1584-480b-ad20-d5024cf420d8" xlink:to="loc_srt_RangeMember_5755b52f-1584-480b-ad20-d5024cf420d8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_c4d74c85-28eb-4172-8bbc-43432521f19e" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_5755b52f-1584-480b-ad20-d5024cf420d8" xlink:to="loc_srt_RangeMember_c4d74c85-28eb-4172-8bbc-43432521f19e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_37b9276c-eb50-41a6-9253-822d468f3bd3" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_c4d74c85-28eb-4172-8bbc-43432521f19e" xlink:to="loc_srt_MinimumMember_37b9276c-eb50-41a6-9253-822d468f3bd3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_58e5f5be-2ee7-4648-be17-6af7bdee0daf" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_c4d74c85-28eb-4172-8bbc-43432521f19e" xlink:to="loc_srt_MaximumMember_58e5f5be-2ee7-4648-be17-6af7bdee0daf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_bb9c8cdd-b960-4a4d-a93b-febcc741d99d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleTable_c97b529b-4903-43c4-8659-c056e4814073" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_bb9c8cdd-b960-4a4d-a93b-febcc741d99d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_bb9c8cdd-b960-4a4d-a93b-febcc741d99d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_bb9c8cdd-b960-4a4d-a93b-febcc741d99d" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_bb9c8cdd-b960-4a4d-a93b-febcc741d99d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_2cd09d1a-d394-4b6e-a03e-1f8e321dfef5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_bb9c8cdd-b960-4a4d-a93b-febcc741d99d" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_2cd09d1a-d394-4b6e-a03e-1f8e321dfef5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_ForcepointMember_bd49b7a8-6b1f-4198-84be-94caf97fd828" xlink:href="rtx-20220630.xsd#rtx_ForcepointMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_2cd09d1a-d394-4b6e-a03e-1f8e321dfef5" xlink:to="loc_rtx_ForcepointMember_bd49b7a8-6b1f-4198-84be-94caf97fd828" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RaytheonIntelligenceSpaceGlobalTrainingAndServicesBusinessMember_3c6ab4bd-5c49-4e56-b19f-437759b5d08a" xlink:href="rtx-20220630.xsd#rtx_RaytheonIntelligenceSpaceGlobalTrainingAndServicesBusinessMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_2cd09d1a-d394-4b6e-a03e-1f8e321dfef5" xlink:to="loc_rtx_RaytheonIntelligenceSpaceGlobalTrainingAndServicesBusinessMember_3c6ab4bd-5c49-4e56-b19f-437759b5d08a" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/RestructuringCostsTables" xlink:type="simple" xlink:href="rtx-20220630.xsd#RestructuringCostsTables"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/RestructuringCostsTables" xlink:type="extended" id="i727d5c7143dc42b4b9aecc7bab967bb3_RestructuringCostsTables">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_3405006b-fe23-45a8-a3e1-676e038a7dd6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_c776f53b-412e-4ebb-9ad1-43d17df3d509" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_3405006b-fe23-45a8-a3e1-676e038a7dd6" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_c776f53b-412e-4ebb-9ad1-43d17df3d509" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RestructuringAndRelatedCostsActionsByYearAxis_654a1cc9-d2e5-4f52-94fb-d7efeaeec139" xlink:href="rtx-20220630.xsd#rtx_RestructuringAndRelatedCostsActionsByYearAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_c776f53b-412e-4ebb-9ad1-43d17df3d509" xlink:to="loc_rtx_RestructuringAndRelatedCostsActionsByYearAxis_654a1cc9-d2e5-4f52-94fb-d7efeaeec139" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RestructuringAndRelatedCostsActionsByYearDomain_654a1cc9-d2e5-4f52-94fb-d7efeaeec139_default" xlink:href="rtx-20220630.xsd#rtx_RestructuringAndRelatedCostsActionsByYearDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_rtx_RestructuringAndRelatedCostsActionsByYearAxis_654a1cc9-d2e5-4f52-94fb-d7efeaeec139" xlink:to="loc_rtx_RestructuringAndRelatedCostsActionsByYearDomain_654a1cc9-d2e5-4f52-94fb-d7efeaeec139_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RestructuringAndRelatedCostsActionsByYearDomain_f2d8b6c4-92db-4cbd-a402-56451cc54aba" xlink:href="rtx-20220630.xsd#rtx_RestructuringAndRelatedCostsActionsByYearDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_rtx_RestructuringAndRelatedCostsActionsByYearAxis_654a1cc9-d2e5-4f52-94fb-d7efeaeec139" xlink:to="loc_rtx_RestructuringAndRelatedCostsActionsByYearDomain_f2d8b6c4-92db-4cbd-a402-56451cc54aba" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/RestructuringCostsDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#RestructuringCostsDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/RestructuringCostsDetails" xlink:type="extended" id="i2702d04b4b394969a8cfa962eb550cec_RestructuringCostsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_ba17cf89-1489-4757-8004-5a693bf8df6e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostExpectedCostAbstract_faca45ae-0b7b-4a7d-9ecd-077b862587ca" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringAndRelatedCostExpectedCostAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_ba17cf89-1489-4757-8004-5a693bf8df6e" xlink:to="loc_us-gaap_RestructuringAndRelatedCostExpectedCostAbstract_faca45ae-0b7b-4a7d-9ecd-077b862587ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8ea83a45-b25b-41b6-90a1-cdbe94ff045f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_ba17cf89-1489-4757-8004-5a693bf8df6e" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8ea83a45-b25b-41b6-90a1-cdbe94ff045f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RestructuringAndRelatedCostsActionsByYearAxis_f9262788-fa8e-40cb-b177-0edb4185fa97" xlink:href="rtx-20220630.xsd#rtx_RestructuringAndRelatedCostsActionsByYearAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8ea83a45-b25b-41b6-90a1-cdbe94ff045f" xlink:to="loc_rtx_RestructuringAndRelatedCostsActionsByYearAxis_f9262788-fa8e-40cb-b177-0edb4185fa97" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RestructuringAndRelatedCostsActionsByYearDomain_f9262788-fa8e-40cb-b177-0edb4185fa97_default" xlink:href="rtx-20220630.xsd#rtx_RestructuringAndRelatedCostsActionsByYearDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_rtx_RestructuringAndRelatedCostsActionsByYearAxis_f9262788-fa8e-40cb-b177-0edb4185fa97" xlink:to="loc_rtx_RestructuringAndRelatedCostsActionsByYearDomain_f9262788-fa8e-40cb-b177-0edb4185fa97_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RestructuringAndRelatedCostsActionsByYearDomain_ddca6610-5e7c-4f8d-9901-73fa26231430" xlink:href="rtx-20220630.xsd#rtx_RestructuringAndRelatedCostsActionsByYearDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_rtx_RestructuringAndRelatedCostsActionsByYearAxis_f9262788-fa8e-40cb-b177-0edb4185fa97" xlink:to="loc_rtx_RestructuringAndRelatedCostsActionsByYearDomain_ddca6610-5e7c-4f8d-9901-73fa26231430" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_7c9e1fee-7475-42d4-85df-e2b59dfa564c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8ea83a45-b25b-41b6-90a1-cdbe94ff045f" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_7c9e1fee-7475-42d4-85df-e2b59dfa564c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_7c9e1fee-7475-42d4-85df-e2b59dfa564c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_7c9e1fee-7475-42d4-85df-e2b59dfa564c" xlink:to="loc_us-gaap_SegmentDomain_7c9e1fee-7475-42d4-85df-e2b59dfa564c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_55090311-e871-4c5e-82db-33a0d4a59d5b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_7c9e1fee-7475-42d4-85df-e2b59dfa564c" xlink:to="loc_us-gaap_SegmentDomain_55090311-e871-4c5e-82db-33a0d4a59d5b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_ead9dd4f-ef48-4aa2-b22c-c572381c1020" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8ea83a45-b25b-41b6-90a1-cdbe94ff045f" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_ead9dd4f-ef48-4aa2-b22c-c572381c1020" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_ead9dd4f-ef48-4aa2-b22c-c572381c1020_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_ead9dd4f-ef48-4aa2-b22c-c572381c1020" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_ead9dd4f-ef48-4aa2-b22c-c572381c1020_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_a585ff3b-bc1b-4956-b5e0-651c70cacc87" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_ead9dd4f-ef48-4aa2-b22c-c572381c1020" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_a585ff3b-bc1b-4956-b5e0-651c70cacc87" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/FinancialInstrumentsTables" xlink:type="simple" xlink:href="rtx-20220630.xsd#FinancialInstrumentsTables"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/FinancialInstrumentsTables" xlink:type="extended" id="i50a9dfa7b1924f158c1196416abe6e9b_FinancialInstrumentsTables">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_3db895c4-d4b7-43db-bdd3-7641f877454b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_39e32967-ccef-45c6-bf94-155af774ce82" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_3db895c4-d4b7-43db-bdd3-7641f877454b" xlink:to="loc_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_39e32967-ccef-45c6-bf94-155af774ce82" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_8514b1eb-7fef-4045-a34e-22b62322a501" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_3db895c4-d4b7-43db-bdd3-7641f877454b" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_8514b1eb-7fef-4045-a34e-22b62322a501" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_2cb2856a-2a8a-42fe-b451-4f7f30ff140e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_8514b1eb-7fef-4045-a34e-22b62322a501" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_2cb2856a-2a8a-42fe-b451-4f7f30ff140e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_2cb2856a-2a8a-42fe-b451-4f7f30ff140e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_2cb2856a-2a8a-42fe-b451-4f7f30ff140e" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_2cb2856a-2a8a-42fe-b451-4f7f30ff140e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_832efebf-ac69-4753-a097-0cf0c4f56e70" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_2cb2856a-2a8a-42fe-b451-4f7f30ff140e" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_832efebf-ac69-4753-a097-0cf0c4f56e70" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_b2c4ddd3-9d5c-4799-b8e3-c54d43fef7e8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_8514b1eb-7fef-4045-a34e-22b62322a501" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_b2c4ddd3-9d5c-4799-b8e3-c54d43fef7e8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_b2c4ddd3-9d5c-4799-b8e3-c54d43fef7e8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_b2c4ddd3-9d5c-4799-b8e3-c54d43fef7e8" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_b2c4ddd3-9d5c-4799-b8e3-c54d43fef7e8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_489b1416-05d6-4252-a7ce-ae407017184d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_b2c4ddd3-9d5c-4799-b8e3-c54d43fef7e8" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_489b1416-05d6-4252-a7ce-ae407017184d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/FinancialInstrumentsDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#FinancialInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/FinancialInstrumentsDetails" xlink:type="extended" id="i68b0ed663cb04a16a6f50ac573801b83_FinancialInstrumentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_74cd53df-fac4-4e67-9e27-25c726b63211" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_03d7eba2-e515-442a-b894-ac167ce5d9c2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_74cd53df-fac4-4e67-9e27-25c726b63211" xlink:to="loc_us-gaap_DerivativeNotionalAmount_03d7eba2-e515-442a-b894-ac167ce5d9c2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyCashFlowHedgeAssetAtFairValue_3b1af2bc-d891-449d-93b7-d01e11063cc3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignCurrencyCashFlowHedgeAssetAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_74cd53df-fac4-4e67-9e27-25c726b63211" xlink:to="loc_us-gaap_ForeignCurrencyCashFlowHedgeAssetAtFairValue_3b1af2bc-d891-449d-93b7-d01e11063cc3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyCashFlowHedgeLiabilityAtFairValue_d2b58315-d80e-42da-a687-499a03a8df6b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignCurrencyCashFlowHedgeLiabilityAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_74cd53df-fac4-4e67-9e27-25c726b63211" xlink:to="loc_us-gaap_ForeignCurrencyCashFlowHedgeLiabilityAtFairValue_d2b58315-d80e-42da-a687-499a03a8df6b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue_c7794f19-f166-4ea8-8d68-6ddb2f2d2393" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_74cd53df-fac4-4e67-9e27-25c726b63211" xlink:to="loc_us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue_c7794f19-f166-4ea8-8d68-6ddb2f2d2393" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue_e49822df-ac66-477d-a754-1e062ded6d8b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_74cd53df-fac4-4e67-9e27-25c726b63211" xlink:to="loc_us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue_e49822df-ac66-477d-a754-1e062ded6d8b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_35537da0-c2ae-4a05-b94c-4ed35e9659e6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_74cd53df-fac4-4e67-9e27-25c726b63211" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_35537da0-c2ae-4a05-b94c-4ed35e9659e6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_1770332f-44d8-40b5-acb4-10b56c04a148" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_74cd53df-fac4-4e67-9e27-25c726b63211" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_1770332f-44d8-40b5-acb4-10b56c04a148" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_fc55469c-e489-444f-b8c6-7c158d24a569" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_1770332f-44d8-40b5-acb4-10b56c04a148" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_fc55469c-e489-444f-b8c6-7c158d24a569" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_fc55469c-e489-444f-b8c6-7c158d24a569_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_fc55469c-e489-444f-b8c6-7c158d24a569" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_fc55469c-e489-444f-b8c6-7c158d24a569_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_2bdbafad-88a3-4efe-a77e-a27af6495bcc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_fc55469c-e489-444f-b8c6-7c158d24a569" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_2bdbafad-88a3-4efe-a77e-a27af6495bcc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCurrentAssetsMember_d3833822-0ec2-4f33-8a6c-3a96977b9c11" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherCurrentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_2bdbafad-88a3-4efe-a77e-a27af6495bcc" xlink:to="loc_us-gaap_OtherCurrentAssetsMember_d3833822-0ec2-4f33-8a6c-3a96977b9c11" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesMember_6e116f5e-fa98-4154-95bf-6be80263bf6f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccruedLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_2bdbafad-88a3-4efe-a77e-a27af6495bcc" xlink:to="loc_us-gaap_AccruedLiabilitiesMember_6e116f5e-fa98-4154-95bf-6be80263bf6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_acc0547f-0d77-4a3e-9dee-cc212f08b424" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_1770332f-44d8-40b5-acb4-10b56c04a148" xlink:to="loc_us-gaap_DebtInstrumentAxis_acc0547f-0d77-4a3e-9dee-cc212f08b424" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_acc0547f-0d77-4a3e-9dee-cc212f08b424_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_acc0547f-0d77-4a3e-9dee-cc212f08b424" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_acc0547f-0d77-4a3e-9dee-cc212f08b424_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_87d26f18-5047-47e9-8040-fce6cf880461" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_acc0547f-0d77-4a3e-9dee-cc212f08b424" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_87d26f18-5047-47e9-8040-fce6cf880461" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_Notes2.150Due2030Member_0769d0d5-5812-4d5e-8df1-685b238cf407" xlink:href="rtx-20220630.xsd#rtx_Notes2.150Due2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_87d26f18-5047-47e9-8040-fce6cf880461" xlink:to="loc_rtx_Notes2.150Due2030Member_0769d0d5-5812-4d5e-8df1-685b238cf407" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/FairValueMeasurementsFairValueHierarchyClassificationDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#FairValueMeasurementsFairValueHierarchyClassificationDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/FairValueMeasurementsFairValueHierarchyClassificationDetails" xlink:type="extended" id="ib502a4581c4a4161999874c1c5beb8b1_FairValueMeasurementsFairValueHierarchyClassificationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3d923f2f-031b-4863-8d1e-f8021691fb2b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketableSecuritiesCurrent_b0f27b7c-dfdb-481f-bde1-9ea8dad3a300" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MarketableSecuritiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3d923f2f-031b-4863-8d1e-f8021691fb2b" xlink:to="loc_us-gaap_MarketableSecuritiesCurrent_b0f27b7c-dfdb-481f-bde1-9ea8dad3a300" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_1c725054-87c6-4363-83bc-c5decd883a1d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3d923f2f-031b-4863-8d1e-f8021691fb2b" xlink:to="loc_us-gaap_DerivativeAssets_1c725054-87c6-4363-83bc-c5decd883a1d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_f1cd306d-e017-45ec-abe8-54c4c611d564" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3d923f2f-031b-4863-8d1e-f8021691fb2b" xlink:to="loc_us-gaap_DerivativeLiabilities_f1cd306d-e017-45ec-abe8-54c4c611d564" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_CustomerFinancingNotesReceivableFairValueDisclosure_bce464ca-1035-4d65-843e-4efd7a6b3b59" xlink:href="rtx-20220630.xsd#rtx_CustomerFinancingNotesReceivableFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3d923f2f-031b-4863-8d1e-f8021691fb2b" xlink:to="loc_rtx_CustomerFinancingNotesReceivableFairValueDisclosure_bce464ca-1035-4d65-843e-4efd7a6b3b59" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_LongTermDebtExcludingCapitalizedLeasesFairValueDisclosure_c9c46cfc-f802-419d-acd6-41437b022be5" xlink:href="rtx-20220630.xsd#rtx_LongTermDebtExcludingCapitalizedLeasesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3d923f2f-031b-4863-8d1e-f8021691fb2b" xlink:to="loc_rtx_LongTermDebtExcludingCapitalizedLeasesFairValueDisclosure_c9c46cfc-f802-419d-acd6-41437b022be5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_6273a823-9e0b-4ebc-bdca-df202f647e60" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3d923f2f-031b-4863-8d1e-f8021691fb2b" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_6273a823-9e0b-4ebc-bdca-df202f647e60" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_04185b73-40ed-4029-8fdf-afdc73a3a025" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_6273a823-9e0b-4ebc-bdca-df202f647e60" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_04185b73-40ed-4029-8fdf-afdc73a3a025" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_04185b73-40ed-4029-8fdf-afdc73a3a025_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_04185b73-40ed-4029-8fdf-afdc73a3a025" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_04185b73-40ed-4029-8fdf-afdc73a3a025_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12c6f15c-4aca-4998-ab3c-fef161d2ff91" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_04185b73-40ed-4029-8fdf-afdc73a3a025" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12c6f15c-4aca-4998-ab3c-fef161d2ff91" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_2e448436-a21a-4cb3-b8a7-6840fa1ca2ce" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12c6f15c-4aca-4998-ab3c-fef161d2ff91" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_2e448436-a21a-4cb3-b8a7-6840fa1ca2ce" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_20443dd0-8e5a-48df-8c02-f353f0106706" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12c6f15c-4aca-4998-ab3c-fef161d2ff91" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_20443dd0-8e5a-48df-8c02-f353f0106706" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_fd02e1e2-fe0f-4852-b126-e95bf7f00e16" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_12c6f15c-4aca-4998-ab3c-fef161d2ff91" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_fd02e1e2-fe0f-4852-b126-e95bf7f00e16" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_29cee835-8e09-4e11-8f55-01c63c19cb10" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_6273a823-9e0b-4ebc-bdca-df202f647e60" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_29cee835-8e09-4e11-8f55-01c63c19cb10" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_29cee835-8e09-4e11-8f55-01c63c19cb10_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_29cee835-8e09-4e11-8f55-01c63c19cb10" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_29cee835-8e09-4e11-8f55-01c63c19cb10_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_ec2607a5-382d-4df3-b3dd-4fd39693695a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_29cee835-8e09-4e11-8f55-01c63c19cb10" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_ec2607a5-382d-4df3-b3dd-4fd39693695a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtOtherThanFairValueFairValueDisclosureMember_126adcc2-3b14-48b4-9505-1d55d5a47bd0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PortionAtOtherThanFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_ec2607a5-382d-4df3-b3dd-4fd39693695a" xlink:to="loc_us-gaap_PortionAtOtherThanFairValueFairValueDisclosureMember_126adcc2-3b14-48b4-9505-1d55d5a47bd0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_e4f9c843-5aa8-4587-af65-35925e6530c0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_ec2607a5-382d-4df3-b3dd-4fd39693695a" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_e4f9c843-5aa8-4587-af65-35925e6530c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_6ce172ba-9d51-476c-bb25-15f1c7854efe" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_ec2607a5-382d-4df3-b3dd-4fd39693695a" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_6ce172ba-9d51-476c-bb25-15f1c7854efe" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/VariableInterestEntitiesDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#VariableInterestEntitiesDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/VariableInterestEntitiesDetails" xlink:type="extended" id="ie39c626264124e909c681a2087026e79_VariableInterestEntitiesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityLineItems_5760b780-c47c-4334-8c73-8685023e31c7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableInterestEntityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_VariableInterestEntityQualitativeOfQuantitativeInformationNetPercentage_2c18f35f-861f-46ff-8983-d162c257a3ec" xlink:href="rtx-20220630.xsd#rtx_VariableInterestEntityQualitativeOfQuantitativeInformationNetPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_5760b780-c47c-4334-8c73-8685023e31c7" xlink:to="loc_rtx_VariableInterestEntityQualitativeOfQuantitativeInformationNetPercentage_2c18f35f-861f-46ff-8983-d162c257a3ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityOwnershipPercentage_5d6e7a0d-1acb-463e-9ee6-e19339d4546d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableInterestEntityOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_5760b780-c47c-4334-8c73-8685023e31c7" xlink:to="loc_us-gaap_VariableInterestEntityOwnershipPercentage_5d6e7a0d-1acb-463e-9ee6-e19339d4546d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_ab096bec-7536-4e8f-9237-af533449ac46" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_5760b780-c47c-4334-8c73-8685023e31c7" xlink:to="loc_us-gaap_AssetsCurrent_ab096bec-7536-4e8f-9237-af533449ac46" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNoncurrent_c94881ae-3990-42ea-879a-0f74ca3c3d3b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_5760b780-c47c-4334-8c73-8685023e31c7" xlink:to="loc_us-gaap_AssetsNoncurrent_c94881ae-3990-42ea-879a-0f74ca3c3d3b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_9d7edc0f-553d-449f-81c1-2ff7a3f20fc6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_5760b780-c47c-4334-8c73-8685023e31c7" xlink:to="loc_us-gaap_Assets_9d7edc0f-553d-449f-81c1-2ff7a3f20fc6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_ed84d994-dcfb-44e2-8a55-7b1a9e791e0b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_5760b780-c47c-4334-8c73-8685023e31c7" xlink:to="loc_us-gaap_LiabilitiesCurrent_ed84d994-dcfb-44e2-8a55-7b1a9e791e0b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_2d1b3c4e-529e-4dbf-a49d-652db326b66a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_5760b780-c47c-4334-8c73-8685023e31c7" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_2d1b3c4e-529e-4dbf-a49d-652db326b66a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_8e798add-28e2-4825-ac0e-f8bae6a4531c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_5760b780-c47c-4334-8c73-8685023e31c7" xlink:to="loc_us-gaap_Liabilities_8e798add-28e2-4825-ac0e-f8bae6a4531c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_5f19bc00-5dc9-4f5f-af22-aa068fe551ed" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_5760b780-c47c-4334-8c73-8685023e31c7" xlink:to="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_5f19bc00-5dc9-4f5f-af22-aa068fe551ed" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_c14d3439-cc12-4bc8-842a-c5bc17ccd84d" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_5f19bc00-5dc9-4f5f-af22-aa068fe551ed" xlink:to="loc_srt_ConsolidatedEntitiesAxis_c14d3439-cc12-4bc8-842a-c5bc17ccd84d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_c14d3439-cc12-4bc8-842a-c5bc17ccd84d_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_c14d3439-cc12-4bc8-842a-c5bc17ccd84d" xlink:to="loc_srt_ConsolidatedEntitiesDomain_c14d3439-cc12-4bc8-842a-c5bc17ccd84d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_81eae11a-a4fc-40e3-a744-a0ac21046bfe" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_c14d3439-cc12-4bc8-842a-c5bc17ccd84d" xlink:to="loc_srt_ConsolidatedEntitiesDomain_81eae11a-a4fc-40e3-a744-a0ac21046bfe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_c083f992-ceda-4411-a1b9-cef625e45751" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_81eae11a-a4fc-40e3-a744-a0ac21046bfe" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_c083f992-ceda-4411-a1b9-cef625e45751" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_InternationalAeroEnginesAGMember_138ee59e-8f17-4515-920b-009651f7c3a0" xlink:href="rtx-20220630.xsd#rtx_InternationalAeroEnginesAGMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_81eae11a-a4fc-40e3-a744-a0ac21046bfe" xlink:to="loc_rtx_InternationalAeroEnginesAGMember_138ee59e-8f17-4515-920b-009651f7c3a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_InternationalAeroEnginesLLCMember_a053a852-190a-4208-a7d4-80cd49bcc496" xlink:href="rtx-20220630.xsd#rtx_InternationalAeroEnginesLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_81eae11a-a4fc-40e3-a744-a0ac21046bfe" xlink:to="loc_rtx_InternationalAeroEnginesLLCMember_a053a852-190a-4208-a7d4-80cd49bcc496" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/GuaranteesDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#GuaranteesDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/GuaranteesDetails" xlink:type="extended" id="i2684ef96c6af41daadd08eff8804964e_GuaranteesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductWarrantyLiabilityLineItems_3f2dcbb3-9082-4e39-8c19-96d33b33ee3b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProductWarrantyLiabilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsMaximumExposure_dd0011d5-82d9-4ad8-a3a7-0e573f2c8449" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GuaranteeObligationsMaximumExposure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductWarrantyLiabilityLineItems_3f2dcbb3-9082-4e39-8c19-96d33b33ee3b" xlink:to="loc_us-gaap_GuaranteeObligationsMaximumExposure_dd0011d5-82d9-4ad8-a3a7-0e573f2c8449" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsCurrentCarryingValue_62ac7f02-064c-4253-82d8-929a144f033c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GuaranteeObligationsCurrentCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductWarrantyLiabilityLineItems_3f2dcbb3-9082-4e39-8c19-96d33b33ee3b" xlink:to="loc_us-gaap_GuaranteeObligationsCurrentCarryingValue_62ac7f02-064c-4253-82d8-929a144f033c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_PartnerShareOfGuarantorObligationsMaximumExposureUndiscounted_9b849e28-bcc8-4e68-92e2-00e82af53f65" xlink:href="rtx-20220630.xsd#rtx_PartnerShareOfGuarantorObligationsMaximumExposureUndiscounted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductWarrantyLiabilityLineItems_3f2dcbb3-9082-4e39-8c19-96d33b33ee3b" xlink:to="loc_rtx_PartnerShareOfGuarantorObligationsMaximumExposureUndiscounted_9b849e28-bcc8-4e68-92e2-00e82af53f65" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductWarrantyAccrual_a9aa37af-6f3c-4851-b85f-c1d826066c81" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProductWarrantyAccrual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductWarrantyLiabilityLineItems_3f2dcbb3-9082-4e39-8c19-96d33b33ee3b" xlink:to="loc_us-gaap_ProductWarrantyAccrual_a9aa37af-6f3c-4851-b85f-c1d826066c81" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductWarrantyAccrualWarrantiesIssued_1c12606f-b6fe-4464-88ed-1935f07c3621" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProductWarrantyAccrualWarrantiesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductWarrantyLiabilityLineItems_3f2dcbb3-9082-4e39-8c19-96d33b33ee3b" xlink:to="loc_us-gaap_ProductWarrantyAccrualWarrantiesIssued_1c12606f-b6fe-4464-88ed-1935f07c3621" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductWarrantyAccrualPayments_ba4db538-d4e8-48cb-bad8-5f7dd086cbc4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProductWarrantyAccrualPayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductWarrantyLiabilityLineItems_3f2dcbb3-9082-4e39-8c19-96d33b33ee3b" xlink:to="loc_us-gaap_ProductWarrantyAccrualPayments_ba4db538-d4e8-48cb-bad8-5f7dd086cbc4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease_3f5d01eb-dc90-4f92-88e5-e05cf46ca273" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductWarrantyLiabilityLineItems_3f2dcbb3-9082-4e39-8c19-96d33b33ee3b" xlink:to="loc_us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease_3f5d01eb-dc90-4f92-88e5-e05cf46ca273" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductWarrantyAccrual_f24f5461-ce3c-4600-bd8d-e8a696461ae2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProductWarrantyAccrual"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductWarrantyLiabilityTable_b149c207-e6f9-40b5-8253-bc4fdc22b2ce" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProductWarrantyLiabilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ProductWarrantyLiabilityLineItems_3f2dcbb3-9082-4e39-8c19-96d33b33ee3b" xlink:to="loc_us-gaap_ProductWarrantyLiabilityTable_b149c207-e6f9-40b5-8253-bc4fdc22b2ce" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_207e54b3-1821-437d-8dab-6f7d567ff69e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ProductWarrantyLiabilityTable_b149c207-e6f9-40b5-8253-bc4fdc22b2ce" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_207e54b3-1821-437d-8dab-6f7d567ff69e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_207e54b3-1821-437d-8dab-6f7d567ff69e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_207e54b3-1821-437d-8dab-6f7d567ff69e" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_207e54b3-1821-437d-8dab-6f7d567ff69e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_f9466a34-1d3a-4a99-a398-f9106005ce52" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_207e54b3-1821-437d-8dab-6f7d567ff69e" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_f9466a34-1d3a-4a99-a398-f9106005ce52" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsByNatureAxis_78c6c8b5-951a-468b-8a18-3ebc7c06f219" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GuaranteeObligationsByNatureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ProductWarrantyLiabilityTable_b149c207-e6f9-40b5-8253-bc4fdc22b2ce" xlink:to="loc_us-gaap_GuaranteeObligationsByNatureAxis_78c6c8b5-951a-468b-8a18-3ebc7c06f219" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_78c6c8b5-951a-468b-8a18-3ebc7c06f219_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GuaranteeObligationsNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_78c6c8b5-951a-468b-8a18-3ebc7c06f219" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_78c6c8b5-951a-468b-8a18-3ebc7c06f219_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_9191944f-6e54-4a3c-8bfe-384dc64e6c68" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GuaranteeObligationsNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_78c6c8b5-951a-468b-8a18-3ebc7c06f219" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_9191944f-6e54-4a3c-8bfe-384dc64e6c68" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_CommercialAerospaceFinancingArrangementsMember_c31fc820-56b9-4405-a908-5288b1025290" xlink:href="rtx-20220630.xsd#rtx_CommercialAerospaceFinancingArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_9191944f-6e54-4a3c-8bfe-384dc64e6c68" xlink:to="loc_rtx_CommercialAerospaceFinancingArrangementsMember_c31fc820-56b9-4405-a908-5288b1025290" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_ThirdPartyGuaranteesMember_122e2334-1004-4c52-ac46-f096dd94e3df" xlink:href="rtx-20220630.xsd#rtx_ThirdPartyGuaranteesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_9191944f-6e54-4a3c-8bfe-384dc64e6c68" xlink:to="loc_rtx_ThirdPartyGuaranteesMember_122e2334-1004-4c52-ac46-f096dd94e3df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_CommercialAerospaceMember_3eb01a3a-3b2c-4e43-bb11-ddd5446532c1" xlink:href="rtx-20220630.xsd#rtx_CommercialAerospaceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_9191944f-6e54-4a3c-8bfe-384dc64e6c68" xlink:to="loc_rtx_CommercialAerospaceMember_3eb01a3a-3b2c-4e43-bb11-ddd5446532c1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeTypeOtherMember_15b391e9-cc11-4c25-b779-3a03ad86197e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GuaranteeTypeOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_9191944f-6e54-4a3c-8bfe-384dc64e6c68" xlink:to="loc_us-gaap_GuaranteeTypeOtherMember_15b391e9-cc11-4c25-b779-3a03ad86197e" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/CommitmentsandContingenciesDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#CommitmentsandContingenciesDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/CommitmentsandContingenciesDetails" xlink:type="extended" id="i5cccac9c33ff4f9ab4547734bd0a5334_CommitmentsandContingenciesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_e0d26e97-d747-46cb-9c66-67c2abcbb9f0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccrualForEnvironmentalLossContingencies_3a13306c-4a56-4ec0-a28e-b8c7b904bbaf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccrualForEnvironmentalLossContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_e0d26e97-d747-46cb-9c66-67c2abcbb9f0" xlink:to="loc_us-gaap_AccrualForEnvironmentalLossContingencies_3a13306c-4a56-4ec0-a28e-b8c7b904bbaf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability_50510f37-ea89-4b22-899a-2d44599c0e93" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_e0d26e97-d747-46cb-9c66-67c2abcbb9f0" xlink:to="loc_us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability_50510f37-ea89-4b22-899a-2d44599c0e93" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitment_dbc71960-6e87-4d9b-8b9f-ff039c62067c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherCommitment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_e0d26e97-d747-46cb-9c66-67c2abcbb9f0" xlink:to="loc_us-gaap_OtherCommitment_dbc71960-6e87-4d9b-8b9f-ff039c62067c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyDamagesSoughtValue_2df62762-668b-444d-bcf4-9a9dcab146e9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LossContingencyDamagesSoughtValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_e0d26e97-d747-46cb-9c66-67c2abcbb9f0" xlink:to="loc_us-gaap_LossContingencyDamagesSoughtValue_2df62762-668b-444d-bcf4-9a9dcab146e9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_LossContingencyInterest_ff49e56a-9fa8-4eac-8540-ccb6057f8a0d" xlink:href="rtx-20220630.xsd#rtx_LossContingencyInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_e0d26e97-d747-46cb-9c66-67c2abcbb9f0" xlink:to="loc_rtx_LossContingencyInterest_ff49e56a-9fa8-4eac-8540-ccb6057f8a0d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_aaddd108-2c31-4bcb-8f52-dec9d14f2b1e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_e0d26e97-d747-46cb-9c66-67c2abcbb9f0" xlink:to="loc_us-gaap_LossContingenciesTable_aaddd108-2c31-4bcb-8f52-dec9d14f2b1e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseAxis_02329815-6690-4ac4-9f8c-fbd1e50fd07e" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_LitigationCaseAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_aaddd108-2c31-4bcb-8f52-dec9d14f2b1e" xlink:to="loc_srt_LitigationCaseAxis_02329815-6690-4ac4-9f8c-fbd1e50fd07e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_02329815-6690-4ac4-9f8c-fbd1e50fd07e_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_02329815-6690-4ac4-9f8c-fbd1e50fd07e" xlink:to="loc_srt_LitigationCaseTypeDomain_02329815-6690-4ac4-9f8c-fbd1e50fd07e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_328c733d-cf1e-4afb-a430-759b1e2ed950" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_02329815-6690-4ac4-9f8c-fbd1e50fd07e" xlink:to="loc_srt_LitigationCaseTypeDomain_328c733d-cf1e-4afb-a430-759b1e2ed950" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_A2019USDefenseContractManagementAgencyClaimAgainstPrattWhitneyMember_daa6b1f1-6318-4a51-beb0-3c0fb8d2c77a" xlink:href="rtx-20220630.xsd#rtx_A2019USDefenseContractManagementAgencyClaimAgainstPrattWhitneyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_328c733d-cf1e-4afb-a430-759b1e2ed950" xlink:to="loc_rtx_A2019USDefenseContractManagementAgencyClaimAgainstPrattWhitneyMember_daa6b1f1-6318-4a51-beb0-3c0fb8d2c77a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_U.S.DefenseContractManagementAgencyClaimAgainstPrattWhitneyMember_9bbd3c2e-e6c0-47ed-9b72-30289e4dd1b7" xlink:href="rtx-20220630.xsd#rtx_U.S.DefenseContractManagementAgencyClaimAgainstPrattWhitneyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_328c733d-cf1e-4afb-a430-759b1e2ed950" xlink:to="loc_rtx_U.S.DefenseContractManagementAgencyClaimAgainstPrattWhitneyMember_9bbd3c2e-e6c0-47ed-9b72-30289e4dd1b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_U.S.DefenseContractManagementAgencyClaimAgainstPrattWhitneysecondclaimMember_f87db667-4a21-495a-990e-45eca83c3ce9" xlink:href="rtx-20220630.xsd#rtx_U.S.DefenseContractManagementAgencyClaimAgainstPrattWhitneysecondclaimMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_328c733d-cf1e-4afb-a430-759b1e2ed950" xlink:to="loc_rtx_U.S.DefenseContractManagementAgencyClaimAgainstPrattWhitneysecondclaimMember_f87db667-4a21-495a-990e-45eca83c3ce9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_DepartmentOfJusticeClaimAgainstRaytheonMissilesDefenseMember_6919d748-0cbf-4d16-9dca-c3185ac4f00e" xlink:href="rtx-20220630.xsd#rtx_DepartmentOfJusticeClaimAgainstRaytheonMissilesDefenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_328c733d-cf1e-4afb-a430-759b1e2ed950" xlink:to="loc_rtx_DepartmentOfJusticeClaimAgainstRaytheonMissilesDefenseMember_6919d748-0cbf-4d16-9dca-c3185ac4f00e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransactionTypeAxis_bfda8503-fe25-45de-8929-c483b15e3c07" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransactionTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_aaddd108-2c31-4bcb-8f52-dec9d14f2b1e" xlink:to="loc_us-gaap_TransactionTypeAxis_bfda8503-fe25-45de-8929-c483b15e3c07" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransactionDomain_bfda8503-fe25-45de-8929-c483b15e3c07_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TransactionTypeAxis_bfda8503-fe25-45de-8929-c483b15e3c07" xlink:to="loc_us-gaap_TransactionDomain_bfda8503-fe25-45de-8929-c483b15e3c07_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransactionDomain_79ac6762-6cd4-460a-b10e-a4e0919c8de2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TransactionTypeAxis_bfda8503-fe25-45de-8929-c483b15e3c07" xlink:to="loc_us-gaap_TransactionDomain_79ac6762-6cd4-460a-b10e-a4e0919c8de2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_OtherFinancingArrangementsMember_1c7f17af-2563-4089-932a-b699422f2ae1" xlink:href="rtx-20220630.xsd#rtx_OtherFinancingArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransactionDomain_79ac6762-6cd4-460a-b10e-a4e0919c8de2" xlink:to="loc_rtx_OtherFinancingArrangementsMember_1c7f17af-2563-4089-932a-b699422f2ae1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesByIndustryAxis_9841a98a-ae31-4cbf-94b2-6b8cb805c87f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquitySecuritiesByIndustryAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_aaddd108-2c31-4bcb-8f52-dec9d14f2b1e" xlink:to="loc_us-gaap_EquitySecuritiesByIndustryAxis_9841a98a-ae31-4cbf-94b2-6b8cb805c87f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesIndustryMember_9841a98a-ae31-4cbf-94b2-6b8cb805c87f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquitySecuritiesIndustryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquitySecuritiesByIndustryAxis_9841a98a-ae31-4cbf-94b2-6b8cb805c87f" xlink:to="loc_us-gaap_EquitySecuritiesIndustryMember_9841a98a-ae31-4cbf-94b2-6b8cb805c87f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesIndustryMember_f6f9cf14-531f-46f0-8f95-8f5b51d57244" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquitySecuritiesIndustryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquitySecuritiesByIndustryAxis_9841a98a-ae31-4cbf-94b2-6b8cb805c87f" xlink:to="loc_us-gaap_EquitySecuritiesIndustryMember_f6f9cf14-531f-46f0-8f95-8f5b51d57244" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_CommercialAerospaceMember_0f203282-e314-4655-8423-589b1f8696a7" xlink:href="rtx-20220630.xsd#rtx_CommercialAerospaceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesIndustryMember_f6f9cf14-531f-46f0-8f95-8f5b51d57244" xlink:to="loc_rtx_CommercialAerospaceMember_0f203282-e314-4655-8423-589b1f8696a7" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/AccumulatedOtherComprehensiveLossSummaryofChangesinAOCIDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#AccumulatedOtherComprehensiveLossSummaryofChangesinAOCIDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/AccumulatedOtherComprehensiveLossSummaryofChangesinAOCIDetails" xlink:type="extended" id="ifb7f8912af5b46c8bca7a7fc50c1013a_AccumulatedOtherComprehensiveLossSummaryofChangesinAOCIDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_17bb5521-5cec-48e2-9da4-6eb0bb39f9fc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_62ea4dd9-9977-440d-a2c4-4d9e9e7609f3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_17bb5521-5cec-48e2-9da4-6eb0bb39f9fc" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_62ea4dd9-9977-440d-a2c4-4d9e9e7609f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax_b029e427-3480-46ca-8c9d-d852883496a2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_17bb5521-5cec-48e2-9da4-6eb0bb39f9fc" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax_b029e427-3480-46ca-8c9d-d852883496a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax_e65ba3c7-9922-43d0-8b97-bb7c4f5c5f38" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_17bb5521-5cec-48e2-9da4-6eb0bb39f9fc" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax_e65ba3c7-9922-43d0-8b97-bb7c4f5c5f38" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_2b67a9c2-22b3-431d-b3b7-573fd35029b4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_17bb5521-5cec-48e2-9da4-6eb0bb39f9fc" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_2b67a9c2-22b3-431d-b3b7-573fd35029b4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_9e4d7cc4-2055-4176-8987-c60b6e549b5e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_17bb5521-5cec-48e2-9da4-6eb0bb39f9fc" xlink:to="loc_us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_9e4d7cc4-2055-4176-8987-c60b6e549b5e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax_81debb3c-2c6a-428d-9ce6-2b09eb251f21" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_17bb5521-5cec-48e2-9da4-6eb0bb39f9fc" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax_81debb3c-2c6a-428d-9ce6-2b09eb251f21" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax_05fbdfaa-93b9-4f60-a272-71d561904b9e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_17bb5521-5cec-48e2-9da4-6eb0bb39f9fc" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax_05fbdfaa-93b9-4f60-a272-71d561904b9e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_d3210b5b-7530-4196-8c69-d15781ecdc86" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_17bb5521-5cec-48e2-9da4-6eb0bb39f9fc" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_d3210b5b-7530-4196-8c69-d15781ecdc86" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent_37df10f7-99e2-4bee-8c3e-7e1f7ccf8d6c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_17bb5521-5cec-48e2-9da4-6eb0bb39f9fc" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent_37df10f7-99e2-4bee-8c3e-7e1f7ccf8d6c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax_bd3fa003-a494-4dee-ae4d-075e0a082bee" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_17bb5521-5cec-48e2-9da4-6eb0bb39f9fc" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax_bd3fa003-a494-4dee-ae4d-075e0a082bee" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_af6bfa9a-3ecf-4a65-a130-60ab854a1d80" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_17bb5521-5cec-48e2-9da4-6eb0bb39f9fc" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_af6bfa9a-3ecf-4a65-a130-60ab854a1d80" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax_f4219703-277d-431a-af78-a034f98c8327" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_17bb5521-5cec-48e2-9da4-6eb0bb39f9fc" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax_f4219703-277d-431a-af78-a034f98c8327" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTax_cefd31b7-51ff-4b0a-9b16-d249e6622b09" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_17bb5521-5cec-48e2-9da4-6eb0bb39f9fc" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTax_cefd31b7-51ff-4b0a-9b16-d249e6622b09" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_ff474579-e71c-497f-9ab5-e719e00244a0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_17bb5521-5cec-48e2-9da4-6eb0bb39f9fc" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_ff474579-e71c-497f-9ab5-e719e00244a0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_5135a4d6-9544-41e0-9378-ce68fdd39ac4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_ff474579-e71c-497f-9ab5-e719e00244a0" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_5135a4d6-9544-41e0-9378-ce68fdd39ac4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_5135a4d6-9544-41e0-9378-ce68fdd39ac4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_5135a4d6-9544-41e0-9378-ce68fdd39ac4" xlink:to="loc_us-gaap_EquityComponentDomain_5135a4d6-9544-41e0-9378-ce68fdd39ac4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_7bb62e75-9eb8-4d73-9aa0-c6a57c98df73" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_5135a4d6-9544-41e0-9378-ce68fdd39ac4" xlink:to="loc_us-gaap_EquityComponentDomain_7bb62e75-9eb8-4d73-9aa0-c6a57c98df73" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_a67dab5f-18d4-4001-ba42-ab68fc0fc54e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_7bb62e75-9eb8-4d73-9aa0-c6a57c98df73" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_a67dab5f-18d4-4001-ba42-ab68fc0fc54e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_29a05a71-0ab9-44d9-acf1-d09037800f4d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_7bb62e75-9eb8-4d73-9aa0-c6a57c98df73" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_29a05a71-0ab9-44d9-acf1-d09037800f4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_4981c1c7-7e09-45b4-a55e-882f5b9627e8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_7bb62e75-9eb8-4d73-9aa0-c6a57c98df73" xlink:to="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_4981c1c7-7e09-45b4-a55e-882f5b9627e8" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/SegmentFinancialDataSegmentOperatingPerformanceDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#SegmentFinancialDataSegmentOperatingPerformanceDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/SegmentFinancialDataSegmentOperatingPerformanceDetails" xlink:type="extended" id="ic01d78c85308488997e404a511b67b1f_SegmentFinancialDataSegmentOperatingPerformanceDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_fa103f01-a742-4ae6-98ec-e861f084d2aa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_f7be61ac-44d3-4734-b0d9-e336de5886bd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fa103f01-a742-4ae6-98ec-e861f084d2aa" xlink:to="loc_us-gaap_Revenues_f7be61ac-44d3-4734-b0d9-e336de5886bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_0fb8fd35-28d6-40bc-902e-08156f85464a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fa103f01-a742-4ae6-98ec-e861f084d2aa" xlink:to="loc_us-gaap_OperatingIncomeLoss_0fb8fd35-28d6-40bc-902e-08156f85464a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_OperatingProfitMargin_70f9ebd2-a74c-455e-92b9-af02f8377cb4" xlink:href="rtx-20220630.xsd#rtx_OperatingProfitMargin"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fa103f01-a742-4ae6-98ec-e861f084d2aa" xlink:to="loc_rtx_OperatingProfitMargin_70f9ebd2-a74c-455e-92b9-af02f8377cb4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_8aa04aeb-0c7b-4587-86eb-43c9b1f2c8c8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fa103f01-a742-4ae6-98ec-e861f084d2aa" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_8aa04aeb-0c7b-4587-86eb-43c9b1f2c8c8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_94253b22-9598-46ac-9015-02e1024b9253" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_8aa04aeb-0c7b-4587-86eb-43c9b1f2c8c8" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_94253b22-9598-46ac-9015-02e1024b9253" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_94253b22-9598-46ac-9015-02e1024b9253_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_94253b22-9598-46ac-9015-02e1024b9253" xlink:to="loc_us-gaap_SegmentDomain_94253b22-9598-46ac-9015-02e1024b9253_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_05ffa1d2-4d93-469b-8573-da309e7ca5f3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_94253b22-9598-46ac-9015-02e1024b9253" xlink:to="loc_us-gaap_SegmentDomain_05ffa1d2-4d93-469b-8573-da309e7ca5f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_CollinsAerospaceSystemsMember_59d7b229-7aad-4a9b-88d4-71df3298ff21" xlink:href="rtx-20220630.xsd#rtx_CollinsAerospaceSystemsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_05ffa1d2-4d93-469b-8573-da309e7ca5f3" xlink:to="loc_rtx_CollinsAerospaceSystemsMember_59d7b229-7aad-4a9b-88d4-71df3298ff21" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_PrattAndWhitneyMember_f28c7c60-42e7-4af5-83a9-f286745f338c" xlink:href="rtx-20220630.xsd#rtx_PrattAndWhitneyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_05ffa1d2-4d93-469b-8573-da309e7ca5f3" xlink:to="loc_rtx_PrattAndWhitneyMember_f28c7c60-42e7-4af5-83a9-f286745f338c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RaytheonIntelligenceSpaceMember_0c031b2b-319a-4d52-a7b8-d6677c0f31d0" xlink:href="rtx-20220630.xsd#rtx_RaytheonIntelligenceSpaceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_05ffa1d2-4d93-469b-8573-da309e7ca5f3" xlink:to="loc_rtx_RaytheonIntelligenceSpaceMember_0c031b2b-319a-4d52-a7b8-d6677c0f31d0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RaytheonMissilesDefenseMember_22759f44-1059-49a5-8368-445ff7d4e45b" xlink:href="rtx-20220630.xsd#rtx_RaytheonMissilesDefenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_05ffa1d2-4d93-469b-8573-da309e7ca5f3" xlink:to="loc_rtx_RaytheonMissilesDefenseMember_22759f44-1059-49a5-8368-445ff7d4e45b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_FASCASOperatingAdjustmentMember_8bcf7337-bf21-4dd8-b88b-f89062860c15" xlink:href="rtx-20220630.xsd#rtx_FASCASOperatingAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_05ffa1d2-4d93-469b-8573-da309e7ca5f3" xlink:to="loc_rtx_FASCASOperatingAdjustmentMember_8bcf7337-bf21-4dd8-b88b-f89062860c15" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_AcquisitionAccountingAdjustmentMemberMember_92fb12be-017b-4bfe-8477-f280952b3377" xlink:href="rtx-20220630.xsd#rtx_AcquisitionAccountingAdjustmentMemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_05ffa1d2-4d93-469b-8573-da309e7ca5f3" xlink:to="loc_rtx_AcquisitionAccountingAdjustmentMemberMember_92fb12be-017b-4bfe-8477-f280952b3377" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_8184d12a-48e7-4cce-bee7-5527abe3e079" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_8aa04aeb-0c7b-4587-86eb-43c9b1f2c8c8" xlink:to="loc_srt_ConsolidationItemsAxis_8184d12a-48e7-4cce-bee7-5527abe3e079" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_8184d12a-48e7-4cce-bee7-5527abe3e079_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_8184d12a-48e7-4cce-bee7-5527abe3e079" xlink:to="loc_srt_ConsolidationItemsDomain_8184d12a-48e7-4cce-bee7-5527abe3e079_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_3f1ecb0c-d1a8-47d4-b29c-4c0d0f4b3bac" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_8184d12a-48e7-4cce-bee7-5527abe3e079" xlink:to="loc_srt_ConsolidationItemsDomain_3f1ecb0c-d1a8-47d4-b29c-4c0d0f4b3bac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_3189acc8-2822-4ede-813d-1db02f7a70eb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_3f1ecb0c-d1a8-47d4-b29c-4c0d0f4b3bac" xlink:to="loc_us-gaap_OperatingSegmentsMember_3189acc8-2822-4ede-813d-1db02f7a70eb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_6e5e28eb-efcb-45da-858c-d8c1f4a65862" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IntersegmentEliminationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_3f1ecb0c-d1a8-47d4-b29c-4c0d0f4b3bac" xlink:to="loc_us-gaap_IntersegmentEliminationMember_6e5e28eb-efcb-45da-858c-d8c1f4a65862" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_67f61498-2af9-45f0-a244-d7dd58ba72f5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_3f1ecb0c-d1a8-47d4-b29c-4c0d0f4b3bac" xlink:to="loc_us-gaap_CorporateNonSegmentMember_67f61498-2af9-45f0-a244-d7dd58ba72f5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaterialReconcilingItemsMember_7506ea80-9cbe-4920-abe5-1d122ec3a335" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MaterialReconcilingItemsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_3f1ecb0c-d1a8-47d4-b29c-4c0d0f4b3bac" xlink:to="loc_us-gaap_MaterialReconcilingItemsMember_7506ea80-9cbe-4920-abe5-1d122ec3a335" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/SegmentFinancialDataDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#SegmentFinancialDataDisaggregationofRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/SegmentFinancialDataDisaggregationofRevenueDetails" xlink:type="extended" id="ibf657b44476a449694d7295f2de9958a_SegmentFinancialDataDisaggregationofRevenueDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_a1ab3d1e-8a06-4e40-b73c-ac803e7e47a6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_c7ee815e-7778-47d9-8a86-5e31e87a70a5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a1ab3d1e-8a06-4e40-b73c-ac803e7e47a6" xlink:to="loc_us-gaap_Revenues_c7ee815e-7778-47d9-8a86-5e31e87a70a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_af404d8b-75d9-4272-a944-1028ef15481b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a1ab3d1e-8a06-4e40-b73c-ac803e7e47a6" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_af404d8b-75d9-4272-a944-1028ef15481b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_d2a09eae-326c-47bc-bc09-72f0696ce0fb" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_af404d8b-75d9-4272-a944-1028ef15481b" xlink:to="loc_srt_ConsolidationItemsAxis_d2a09eae-326c-47bc-bc09-72f0696ce0fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_d2a09eae-326c-47bc-bc09-72f0696ce0fb_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_d2a09eae-326c-47bc-bc09-72f0696ce0fb" xlink:to="loc_srt_ConsolidationItemsDomain_d2a09eae-326c-47bc-bc09-72f0696ce0fb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_3797b423-8aae-431a-829a-85fc7e6bb063" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_d2a09eae-326c-47bc-bc09-72f0696ce0fb" xlink:to="loc_srt_ConsolidationItemsDomain_3797b423-8aae-431a-829a-85fc7e6bb063" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_590716fa-63ca-4734-a542-3c497f32aa42" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_3797b423-8aae-431a-829a-85fc7e6bb063" xlink:to="loc_us-gaap_OperatingSegmentsMember_590716fa-63ca-4734-a542-3c497f32aa42" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_53aa39c8-4bd6-427d-9358-77fed20a8ce9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IntersegmentEliminationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_3797b423-8aae-431a-829a-85fc7e6bb063" xlink:to="loc_us-gaap_IntersegmentEliminationMember_53aa39c8-4bd6-427d-9358-77fed20a8ce9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_22f99c2f-78f9-4fcb-bc35-bdfa3b71c702" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_af404d8b-75d9-4272-a944-1028ef15481b" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_22f99c2f-78f9-4fcb-bc35-bdfa3b71c702" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_22f99c2f-78f9-4fcb-bc35-bdfa3b71c702_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_22f99c2f-78f9-4fcb-bc35-bdfa3b71c702" xlink:to="loc_us-gaap_SegmentDomain_22f99c2f-78f9-4fcb-bc35-bdfa3b71c702_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_ff5cd146-4ffa-427b-a837-160850dec304" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_22f99c2f-78f9-4fcb-bc35-bdfa3b71c702" xlink:to="loc_us-gaap_SegmentDomain_ff5cd146-4ffa-427b-a837-160850dec304" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_CollinsAerospaceSystemsMember_c442c52d-bc40-4ac8-bcf3-0d9f6eed799d" xlink:href="rtx-20220630.xsd#rtx_CollinsAerospaceSystemsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ff5cd146-4ffa-427b-a837-160850dec304" xlink:to="loc_rtx_CollinsAerospaceSystemsMember_c442c52d-bc40-4ac8-bcf3-0d9f6eed799d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_PrattAndWhitneyMember_3cc71a78-81fd-4c89-9460-98e7e49f7838" xlink:href="rtx-20220630.xsd#rtx_PrattAndWhitneyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ff5cd146-4ffa-427b-a837-160850dec304" xlink:to="loc_rtx_PrattAndWhitneyMember_3cc71a78-81fd-4c89-9460-98e7e49f7838" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RaytheonIntelligenceSpaceMember_b75dfc6c-8615-433f-aed8-604be00b9bbe" xlink:href="rtx-20220630.xsd#rtx_RaytheonIntelligenceSpaceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ff5cd146-4ffa-427b-a837-160850dec304" xlink:to="loc_rtx_RaytheonIntelligenceSpaceMember_b75dfc6c-8615-433f-aed8-604be00b9bbe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RaytheonMissilesDefenseMember_cb483d7a-b9ed-42af-97c3-7d3c49dad046" xlink:href="rtx-20220630.xsd#rtx_RaytheonMissilesDefenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ff5cd146-4ffa-427b-a837-160850dec304" xlink:to="loc_rtx_RaytheonMissilesDefenseMember_cb483d7a-b9ed-42af-97c3-7d3c49dad046" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllOtherSegmentsMember_9d4ab653-b531-471a-a24b-5e0593f84e18" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AllOtherSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ff5cd146-4ffa-427b-a837-160850dec304" xlink:to="loc_us-gaap_AllOtherSegmentsMember_9d4ab653-b531-471a-a24b-5e0593f84e18" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_PrimaryGeographicalMarketsAxis_70090eea-b2bb-4a24-9641-1b0967a141ad" xlink:href="rtx-20220630.xsd#rtx_PrimaryGeographicalMarketsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_af404d8b-75d9-4272-a944-1028ef15481b" xlink:to="loc_rtx_PrimaryGeographicalMarketsAxis_70090eea-b2bb-4a24-9641-1b0967a141ad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_PrimaryGeographicalMarketsDomain_70090eea-b2bb-4a24-9641-1b0967a141ad_default" xlink:href="rtx-20220630.xsd#rtx_PrimaryGeographicalMarketsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_rtx_PrimaryGeographicalMarketsAxis_70090eea-b2bb-4a24-9641-1b0967a141ad" xlink:to="loc_rtx_PrimaryGeographicalMarketsDomain_70090eea-b2bb-4a24-9641-1b0967a141ad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_PrimaryGeographicalMarketsDomain_bfe41ec7-dccf-4181-8ce2-4ddefec6cecc" xlink:href="rtx-20220630.xsd#rtx_PrimaryGeographicalMarketsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_rtx_PrimaryGeographicalMarketsAxis_70090eea-b2bb-4a24-9641-1b0967a141ad" xlink:to="loc_rtx_PrimaryGeographicalMarketsDomain_bfe41ec7-dccf-4181-8ce2-4ddefec6cecc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_77b3c0c3-702d-4043-adc8-882273b0a32f" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_PrimaryGeographicalMarketsDomain_bfe41ec7-dccf-4181-8ce2-4ddefec6cecc" xlink:to="loc_country_US_77b3c0c3-702d-4043-adc8-882273b0a32f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EuropeMember_dfe76ba1-f87a-4044-9bd7-bb09ecf2b008" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_EuropeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_PrimaryGeographicalMarketsDomain_bfe41ec7-dccf-4181-8ce2-4ddefec6cecc" xlink:to="loc_srt_EuropeMember_dfe76ba1-f87a-4044-9bd7-bb09ecf2b008" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AsiaPacificMember_ea4a8175-c805-4a93-9f39-69b4d294ec28" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_AsiaPacificMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_PrimaryGeographicalMarketsDomain_bfe41ec7-dccf-4181-8ce2-4ddefec6cecc" xlink:to="loc_srt_AsiaPacificMember_ea4a8175-c805-4a93-9f39-69b4d294ec28" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_MiddleEastAndNorthAfricaMemberMember_90466452-74e3-4fdb-8bfe-598ceb580ae1" xlink:href="rtx-20220630.xsd#rtx_MiddleEastAndNorthAfricaMemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_PrimaryGeographicalMarketsDomain_bfe41ec7-dccf-4181-8ce2-4ddefec6cecc" xlink:to="loc_rtx_MiddleEastAndNorthAfricaMemberMember_90466452-74e3-4fdb-8bfe-598ceb580ae1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_OtherMember_91dcd08e-7f46-45ce-a88f-c74f9ea27c95" xlink:href="rtx-20220630.xsd#rtx_OtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_PrimaryGeographicalMarketsDomain_bfe41ec7-dccf-4181-8ce2-4ddefec6cecc" xlink:to="loc_rtx_OtherMember_91dcd08e-7f46-45ce-a88f-c74f9ea27c95" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_a56c53fb-1e4f-47d6-9459-d3b970d9e87c" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_af404d8b-75d9-4272-a944-1028ef15481b" xlink:to="loc_srt_MajorCustomersAxis_a56c53fb-1e4f-47d6-9459-d3b970d9e87c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_a56c53fb-1e4f-47d6-9459-d3b970d9e87c_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_a56c53fb-1e4f-47d6-9459-d3b970d9e87c" xlink:to="loc_srt_NameOfMajorCustomerDomain_a56c53fb-1e4f-47d6-9459-d3b970d9e87c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_0483cf36-9dca-421d-b8c1-46e6bc95ba13" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_a56c53fb-1e4f-47d6-9459-d3b970d9e87c" xlink:to="loc_srt_NameOfMajorCustomerDomain_0483cf36-9dca-421d-b8c1-46e6bc95ba13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_USGovernmentSalesExcludingForeignMilitarySalesMemberMember_b0a82be0-612c-445a-ae00-b2ff0e494a44" xlink:href="rtx-20220630.xsd#rtx_USGovernmentSalesExcludingForeignMilitarySalesMemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_0483cf36-9dca-421d-b8c1-46e6bc95ba13" xlink:to="loc_rtx_USGovernmentSalesExcludingForeignMilitarySalesMemberMember_b0a82be0-612c-445a-ae00-b2ff0e494a44" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_ForeignMilitarySalesThroughTheUSGovernmentMemberMember_80437717-3b4f-4a89-8310-16989503a321" xlink:href="rtx-20220630.xsd#rtx_ForeignMilitarySalesThroughTheUSGovernmentMemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_0483cf36-9dca-421d-b8c1-46e6bc95ba13" xlink:to="loc_rtx_ForeignMilitarySalesThroughTheUSGovernmentMemberMember_80437717-3b4f-4a89-8310-16989503a321" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_ForeignGovernmentDirectCommercialSalesMemberMember_4f05e36e-e068-4fb2-84cf-10eb981e407b" xlink:href="rtx-20220630.xsd#rtx_ForeignGovernmentDirectCommercialSalesMemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_0483cf36-9dca-421d-b8c1-46e6bc95ba13" xlink:to="loc_rtx_ForeignGovernmentDirectCommercialSalesMemberMember_4f05e36e-e068-4fb2-84cf-10eb981e407b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_CommercialAerospaceAndOtherCommercialMemberMember_573095be-dd0b-48ab-a37e-b270f796ba8f" xlink:href="rtx-20220630.xsd#rtx_CommercialAerospaceAndOtherCommercialMemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_0483cf36-9dca-421d-b8c1-46e6bc95ba13" xlink:to="loc_rtx_CommercialAerospaceAndOtherCommercialMemberMember_573095be-dd0b-48ab-a37e-b270f796ba8f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_SalesTypeAxis_401a9747-3662-4e78-8520-21783f9f9cdc" xlink:href="rtx-20220630.xsd#rtx_SalesTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_af404d8b-75d9-4272-a944-1028ef15481b" xlink:to="loc_rtx_SalesTypeAxis_401a9747-3662-4e78-8520-21783f9f9cdc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_SalesTypeDomain_401a9747-3662-4e78-8520-21783f9f9cdc_default" xlink:href="rtx-20220630.xsd#rtx_SalesTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_rtx_SalesTypeAxis_401a9747-3662-4e78-8520-21783f9f9cdc" xlink:to="loc_rtx_SalesTypeDomain_401a9747-3662-4e78-8520-21783f9f9cdc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_SalesTypeDomain_70326be1-906a-4421-a73d-6d2b4c3c278c" xlink:href="rtx-20220630.xsd#rtx_SalesTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_rtx_SalesTypeAxis_401a9747-3662-4e78-8520-21783f9f9cdc" xlink:to="loc_rtx_SalesTypeDomain_70326be1-906a-4421-a73d-6d2b4c3c278c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductMember_e80d38d5-c947-460e-be07-d90ad78e4b42" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProductMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_SalesTypeDomain_70326be1-906a-4421-a73d-6d2b4c3c278c" xlink:to="loc_us-gaap_ProductMember_e80d38d5-c947-460e-be07-d90ad78e4b42" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServiceMember_a4eb0eec-2dbb-431f-a221-93c451e5f5ee" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_SalesTypeDomain_70326be1-906a-4421-a73d-6d2b4c3c278c" xlink:to="loc_us-gaap_ServiceMember_a4eb0eec-2dbb-431f-a221-93c451e5f5ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerBasisOfPricingAxis_1b94b18a-e3fa-4f32-a7a9-7127afcdb34e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerBasisOfPricingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_af404d8b-75d9-4272-a944-1028ef15481b" xlink:to="loc_us-gaap_ContractWithCustomerBasisOfPricingAxis_1b94b18a-e3fa-4f32-a7a9-7127afcdb34e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_1b94b18a-e3fa-4f32-a7a9-7127afcdb34e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerBasisOfPricingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ContractWithCustomerBasisOfPricingAxis_1b94b18a-e3fa-4f32-a7a9-7127afcdb34e" xlink:to="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_1b94b18a-e3fa-4f32-a7a9-7127afcdb34e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_47a0faeb-1088-4084-9d28-b1cbe74920d7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerBasisOfPricingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ContractWithCustomerBasisOfPricingAxis_1b94b18a-e3fa-4f32-a7a9-7127afcdb34e" xlink:to="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_47a0faeb-1088-4084-9d28-b1cbe74920d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedPriceContractMember_f1a11332-19dd-4e6b-9a56-0548840c7a5d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FixedPriceContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_47a0faeb-1088-4084-9d28-b1cbe74920d7" xlink:to="loc_us-gaap_FixedPriceContractMember_f1a11332-19dd-4e6b-9a56-0548840c7a5d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimeAndMaterialsContractMember_e86ae168-5b7c-4700-9f60-b46324bc65ec" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TimeAndMaterialsContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_47a0faeb-1088-4084-9d28-b1cbe74920d7" xlink:to="loc_us-gaap_TimeAndMaterialsContractMember_e86ae168-5b7c-4700-9f60-b46324bc65ec" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.rtx.com/role/RemainingPerformanceObligationsRPODetails" xlink:type="simple" xlink:href="rtx-20220630.xsd#RemainingPerformanceObligationsRPODetails"/>
  <link:definitionLink xlink:role="http://www.rtx.com/role/RemainingPerformanceObligationsRPODetails" xlink:type="extended" id="ifc3af355b5634f0e96fe38075544e221_RemainingPerformanceObligationsRPODetails">
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RemainingPerformanceObligationLineItems_0015f44e-4644-4351-be7a-a5c266182bd9" xlink:href="rtx-20220630.xsd#rtx_RemainingPerformanceObligationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_cf6475bc-1239-4b84-b497-9f30d8888c99" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_RemainingPerformanceObligationLineItems_0015f44e-4644-4351-be7a-a5c266182bd9" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_cf6475bc-1239-4b84-b497-9f30d8888c99" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RemainingPerformanceObligationRPOReversal_fbb179ef-40df-417d-95e6-0727885f5835" xlink:href="rtx-20220630.xsd#rtx_RemainingPerformanceObligationRPOReversal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_RemainingPerformanceObligationLineItems_0015f44e-4644-4351-be7a-a5c266182bd9" xlink:to="loc_rtx_RemainingPerformanceObligationRPOReversal_fbb179ef-40df-417d-95e6-0727885f5835" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RevenueRemainingPerformanceObligationsToBeRecognizedWithin12Months_6509836e-d204-4b9c-8c09-051071637a73" xlink:href="rtx-20220630.xsd#rtx_RevenueRemainingPerformanceObligationsToBeRecognizedWithin12Months"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_RemainingPerformanceObligationLineItems_0015f44e-4644-4351-be7a-a5c266182bd9" xlink:to="loc_rtx_RevenueRemainingPerformanceObligationsToBeRecognizedWithin12Months_6509836e-d204-4b9c-8c09-051071637a73" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RevenueRemainingPerformanceObligationsRPORelatedToLongTermCommercialAerospaceMaintenanceContractsAtPrattWhitney_520984a6-141a-45aa-943d-39bd74a244ad" xlink:href="rtx-20220630.xsd#rtx_RevenueRemainingPerformanceObligationsRPORelatedToLongTermCommercialAerospaceMaintenanceContractsAtPrattWhitney"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_RemainingPerformanceObligationLineItems_0015f44e-4644-4351-be7a-a5c266182bd9" xlink:to="loc_rtx_RevenueRemainingPerformanceObligationsRPORelatedToLongTermCommercialAerospaceMaintenanceContractsAtPrattWhitney_520984a6-141a-45aa-943d-39bd74a244ad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RevenueRemainingPerformanceObligationGeneralSpanOfPrattWhitneyLongTermCommercialAerospaceMaintenanceContractsInYears_fff2b869-f014-43e1-abb2-817649b2182a" xlink:href="rtx-20220630.xsd#rtx_RevenueRemainingPerformanceObligationGeneralSpanOfPrattWhitneyLongTermCommercialAerospaceMaintenanceContractsInYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rtx_RemainingPerformanceObligationLineItems_0015f44e-4644-4351-be7a-a5c266182bd9" xlink:to="loc_rtx_RevenueRemainingPerformanceObligationGeneralSpanOfPrattWhitneyLongTermCommercialAerospaceMaintenanceContractsInYears_fff2b869-f014-43e1-abb2-817649b2182a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RemainingPerformanceObligationTable_26a93722-29ab-450c-8485-aa112afdc639" xlink:href="rtx-20220630.xsd#rtx_RemainingPerformanceObligationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_rtx_RemainingPerformanceObligationLineItems_0015f44e-4644-4351-be7a-a5c266182bd9" xlink:to="loc_rtx_RemainingPerformanceObligationTable_26a93722-29ab-450c-8485-aa112afdc639" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_08421c8c-f93c-42c7-8da6-363cbd86e620" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_rtx_RemainingPerformanceObligationTable_26a93722-29ab-450c-8485-aa112afdc639" xlink:to="loc_srt_StatementScenarioAxis_08421c8c-f93c-42c7-8da6-363cbd86e620" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_08421c8c-f93c-42c7-8da6-363cbd86e620_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_08421c8c-f93c-42c7-8da6-363cbd86e620" xlink:to="loc_srt_ScenarioUnspecifiedDomain_08421c8c-f93c-42c7-8da6-363cbd86e620_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_cb028ca6-c096-45f6-82bd-0af65bf374ca" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_08421c8c-f93c-42c7-8da6-363cbd86e620" xlink:to="loc_srt_ScenarioUnspecifiedDomain_cb028ca6-c096-45f6-82bd-0af65bf374ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rtx_RPORelatedToOurSalesContractsInRussiaMember_5d2d7a4d-faba-409f-8c37-3bf169b58688" xlink:href="rtx-20220630.xsd#rtx_RPORelatedToOurSalesContractsInRussiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_cb028ca6-c096-45f6-82bd-0af65bf374ca" xlink:to="loc_rtx_RPORelatedToOurSalesContractsInRussiaMember_5d2d7a4d-faba-409f-8c37-3bf169b58688" xlink:type="arc" order="0"/>
  </link:definitionLink>
</link:linkbase>
