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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019eb6a1-1a50-747b-8f95-90157788f795,g:91b9c7fd-f2a3-4646-a98b-c57b6858c87b-->
<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.generaldynamics.com/role/Cover" xlink:type="simple" xlink:href="gd-20260617.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_019eb6a1-1a50-75ed-b672-a032cb5dced8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_019eb6a1-1a50-717c-8acb-e81a0e5fd365" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_019eb6a1-1a50-75ed-b672-a032cb5dced8" xlink:to="loc_dei_DocumentInformationTable_019eb6a1-1a50-717c-8acb-e81a0e5fd365" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1a50-7c47-9277-e3bb76eae097" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_019eb6a1-1a50-717c-8acb-e81a0e5fd365" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1a50-7c47-9277-e3bb76eae097" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1a50-7c47-9277-e3bb76eae097_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1a50-7c47-9277-e3bb76eae097" xlink:to="loc_dei_EntityDomain_019eb6a1-1a50-7c47-9277-e3bb76eae097_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1a50-7a10-b40b-b91462c66274" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1a50-7c47-9277-e3bb76eae097" xlink:to="loc_dei_EntityDomain_019eb6a1-1a50-7a10-b40b-b91462c66274" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1a50-7cc7-b4c0-5747a159a1a2" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1a50-7a10-b40b-b91462c66274" xlink:to="loc_gd_EBP006Member_019eb6a1-1a50-7cc7-b4c0-5747a159a1a2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019eb6a1-1a50-79a4-81e5-63de1e7b00a0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019eb6a1-1a50-75ed-b672-a032cb5dced8" xlink:to="loc_dei_DocumentType_019eb6a1-1a50-79a4-81e5-63de1e7b00a0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019eb6a1-1a50-7322-b8d6-6e811332832b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019eb6a1-1a50-75ed-b672-a032cb5dced8" xlink:to="loc_dei_EntityRegistrantName_019eb6a1-1a50-7322-b8d6-6e811332832b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019eb6a1-1a50-7771-9a09-2c64a71b4119" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019eb6a1-1a50-75ed-b672-a032cb5dced8" xlink:to="loc_dei_AmendmentFlag_019eb6a1-1a50-7771-9a09-2c64a71b4119" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019eb6a1-1a50-71b8-bde0-46f17da63e72" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019eb6a1-1a50-75ed-b672-a032cb5dced8" xlink:to="loc_dei_EntityCentralIndexKey_019eb6a1-1a50-71b8-bde0-46f17da63e72" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/StatementsofNetAssetsAvailableforBenefits" xlink:type="simple" xlink:href="gd-20260617.xsd#StatementsofNetAssetsAvailableforBenefits"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/StatementsofNetAssetsAvailableforBenefits" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitLineItems_019eb6a1-1a50-7297-93c3-29cf4db4bf6c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitTable_019eb6a1-1a50-789a-bdc7-af3543c00e19" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitLineItems_019eb6a1-1a50-7297-93c3-29cf4db4bf6c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitTable_019eb6a1-1a50-789a-bdc7-af3543c00e19" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1a50-7cdb-bdc5-2040b86b658a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitTable_019eb6a1-1a50-789a-bdc7-af3543c00e19" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1a50-7cdb-bdc5-2040b86b658a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1a50-7cdb-bdc5-2040b86b658a_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1a50-7cdb-bdc5-2040b86b658a" xlink:to="loc_dei_EntityDomain_019eb6a1-1a50-7cdb-bdc5-2040b86b658a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1a50-7edf-8be3-97dec49fea69" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1a50-7cdb-bdc5-2040b86b658a" xlink:to="loc_dei_EntityDomain_019eb6a1-1a50-7edf-8be3-97dec49fea69" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1a50-7e68-a1f9-4fdc7a2d6176" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1a50-7edf-8be3-97dec49fea69" xlink:to="loc_gd_EBP006Member_019eb6a1-1a50-7e68-a1f9-4fdc7a2d6176" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAssetAbstract_019eb6a1-1a50-753d-84c8-a188fd264586" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAssetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitLineItems_019eb6a1-1a50-7297-93c3-29cf4db4bf6c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanAssetAbstract_019eb6a1-1a50-753d-84c8-a188fd264586" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue_019eb6a1-1a50-735c-80ce-67891395be33" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAssetAbstract_019eb6a1-1a50-753d-84c8-a188fd264586" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue_019eb6a1-1a50-735c-80ce-67891395be33" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustContractValue_019eb6a1-1a50-767e-b93a-f6ca0a012995" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustContractValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAssetAbstract_019eb6a1-1a50-753d-84c8-a188fd264586" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustContractValue_019eb6a1-1a50-767e-b93a-f6ca0a012995" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipant_019eb6a1-1a50-7ef6-a461-52278c388f39" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAssetAbstract_019eb6a1-1a50-753d-84c8-a188fd264586" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipant_019eb6a1-1a50-7ef6-a461-52278c388f39" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionReceivable_019eb6a1-1a50-7c20-b24d-ace463482845" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanEmployerContributionReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAssetAbstract_019eb6a1-1a50-753d-84c8-a188fd264586" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionReceivable_019eb6a1-1a50-7c20-b24d-ace463482845" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAsset_019eb6a1-1a50-70c9-8b8b-ba42fcb61522" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAssetAbstract_019eb6a1-1a50-753d-84c8-a188fd264586" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanAsset_019eb6a1-1a50-70c9-8b8b-ba42fcb61522" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanLiabilityAbstract_019eb6a1-1a50-7afb-acf9-38d90be259a3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanLiabilityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitLineItems_019eb6a1-1a50-7297-93c3-29cf4db4bf6c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanLiabilityAbstract_019eb6a1-1a50-7afb-acf9-38d90be259a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAccruedExpense_019eb6a1-1a50-74f5-ab83-f0c04502250a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAccruedExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanLiabilityAbstract_019eb6a1-1a50-7afb-acf9-38d90be259a3" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanAccruedExpense_019eb6a1-1a50-74f5-ab83-f0c04502250a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019eb6a1-1a50-79ce-a616-de142538ad78" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanLiabilityAbstract_019eb6a1-1a50-7afb-acf9-38d90be259a3" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019eb6a1-1a50-79ce-a616-de142538ad78" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/StatementofChangesinNetAssetsAvailableforBenefits" xlink:type="simple" xlink:href="gd-20260617.xsd#StatementofChangesinNetAssetsAvailableforBenefits"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/StatementofChangesinNetAssetsAvailableforBenefits" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems_019eb6a1-1a50-7ed4-a33b-eaa21a7251b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitTable_019eb6a1-1a50-777b-93c2-12dd70668d9e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems_019eb6a1-1a50-7ed4-a33b-eaa21a7251b7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitTable_019eb6a1-1a50-777b-93c2-12dd70668d9e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1a50-74fe-9740-6d0a2f19a3d1" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitTable_019eb6a1-1a50-777b-93c2-12dd70668d9e" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1a50-74fe-9740-6d0a2f19a3d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1a50-74fe-9740-6d0a2f19a3d1_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1a50-74fe-9740-6d0a2f19a3d1" xlink:to="loc_dei_EntityDomain_019eb6a1-1a50-74fe-9740-6d0a2f19a3d1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1a50-7d3f-a10c-af1b09331175" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1a50-74fe-9740-6d0a2f19a3d1" xlink:to="loc_dei_EntityDomain_019eb6a1-1a50-7d3f-a10c-af1b09331175" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1a50-750c-84ec-45749a379fbc" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1a50-7d3f-a10c-af1b09331175" xlink:to="loc_gd_EBP006Member_019eb6a1-1a50-750c-84ec-45749a379fbc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract_019eb6a1-1a50-7afe-a7ee-1569d3d95a5e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems_019eb6a1-1a50-7ed4-a33b-eaa21a7251b7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract_019eb6a1-1a50-7afe-a7ee-1569d3d95a5e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestment_019eb6a1-1a50-7620-a109-7db5ae681f5d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract_019eb6a1-1a50-7afe-a7ee-1569d3d95a5e" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestment_019eb6a1-1a50-7620-a109-7db5ae681f5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestIncomeOnNoteReceivableFromParticipant_019eb6a1-1a50-7557-9366-16efa7643f79" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestIncomeOnNoteReceivableFromParticipant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract_019eb6a1-1a50-7afe-a7ee-1569d3d95a5e" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestIncomeOnNoteReceivableFromParticipant_019eb6a1-1a50-7557-9366-16efa7643f79" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContributionAbstract_019eb6a1-1a50-71b2-beb2-1077001b30d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContributionAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract_019eb6a1-1a50-7afe-a7ee-1569d3d95a5e" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContributionAbstract_019eb6a1-1a50-71b2-beb2-1077001b30d9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContributionRollover_019eb6a1-1a50-7465-a434-fa2b4b97ba5f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContributionRollover"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContributionAbstract_019eb6a1-1a50-71b2-beb2-1077001b30d9" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContributionRollover_019eb6a1-1a50-7465-a434-fa2b4b97ba5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContributionExcludingRollover_019eb6a1-1a50-79e3-9e44-2d9157c9b17b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContributionExcludingRollover"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContributionAbstract_019eb6a1-1a50-71b2-beb2-1077001b30d9" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContributionExcludingRollover_019eb6a1-1a50-79e3-9e44-2d9157c9b17b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContributionCash_019eb6a1-1a50-70d9-a546-c33801cc0b95" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContributionCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContributionAbstract_019eb6a1-1a50-71b2-beb2-1077001b30d9" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContributionCash_019eb6a1-1a50-70d9-a546-c33801cc0b95" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContribution_019eb6a1-1a50-76e1-b267-d0425d857030" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContributionAbstract_019eb6a1-1a50-71b2-beb2-1077001b30d9" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContribution_019eb6a1-1a50-76e1-b267-d0425d857030" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease_019eb6a1-1a50-7d62-bfc5-b6c2eb20ee0f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract_019eb6a1-1a50-7afe-a7ee-1569d3d95a5e" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease_019eb6a1-1a50-7d62-bfc5-b6c2eb20ee0f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract_019eb6a1-1a50-720f-9d65-eb13dc21638a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems_019eb6a1-1a50-7ed4-a33b-eaa21a7251b7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract_019eb6a1-1a50-720f-9d65-eb13dc21638a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant_019eb6a1-1a50-7d52-98cf-f9d4acbca9d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract_019eb6a1-1a50-720f-9d65-eb13dc21638a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant_019eb6a1-1a50-7d52-98cf-f9d4acbca9d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForAdministrativeExpense_019eb6a1-1a50-7bf3-8def-c8da3f24b7e0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract_019eb6a1-1a50-720f-9d65-eb13dc21638a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForAdministrativeExpense_019eb6a1-1a50-7bf3-8def-c8da3f24b7e0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease_019eb6a1-1a50-7ad1-8520-8e1ac7987ec9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract_019eb6a1-1a50-720f-9d65-eb13dc21638a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease_019eb6a1-1a50-7ad1-8520-8e1ac7987ec9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease_019eb6a1-1a50-77fa-b13b-b75002a91be9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems_019eb6a1-1a50-7ed4-a33b-eaa21a7251b7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease_019eb6a1-1a50-77fa-b13b-b75002a91be9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitTransferToFromFundWithinEsop_019eb6a1-1a50-70d8-b0f1-da79955de65b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitTransferToFromFundWithinEsop"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems_019eb6a1-1a50-7ed4-a33b-eaa21a7251b7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitTransferToFromFundWithinEsop_019eb6a1-1a50-70d8-b0f1-da79955de65b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPChangeInNetAssetAvailableForBenefitIncludingPlanTransfersIncreaseDecrease_019eb6a1-1a50-7659-9f79-311e98aecede" xlink:href="gd-20260617.xsd#gd_EBPChangeInNetAssetAvailableForBenefitIncludingPlanTransfersIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems_019eb6a1-1a50-7ed4-a33b-eaa21a7251b7" xlink:to="loc_gd_EBPChangeInNetAssetAvailableForBenefitIncludingPlanTransfersIncreaseDecrease_019eb6a1-1a50-7659-9f79-311e98aecede" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseAbstract_019eb6a1-1a50-772a-accb-a410ea02b173" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems_019eb6a1-1a50-7ed4-a33b-eaa21a7251b7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseAbstract_019eb6a1-1a50-772a-accb-a410ea02b173" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019eb6a1-1a50-7172-96f9-c46d7ef6ed8a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseAbstract_019eb6a1-1a50-772a-accb-a410ea02b173" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019eb6a1-1a50-7172-96f9-c46d7ef6ed8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019eb6a1-1a50-7932-9235-bb6bc73e5b7e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/PlanDescription" xlink:type="simple" xlink:href="gd-20260617.xsd#PlanDescription"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/PlanDescription" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7bc7-a312-4eeee9fa0938" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019eb6a1-1afb-7383-8e26-aafce37188b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7bc7-a312-4eeee9fa0938" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019eb6a1-1afb-7383-8e26-aafce37188b1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-74e1-b148-3986f4b03ffe" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019eb6a1-1afb-7383-8e26-aafce37188b1" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-74e1-b148-3986f4b03ffe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-74e1-b148-3986f4b03ffe_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-74e1-b148-3986f4b03ffe" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-74e1-b148-3986f4b03ffe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7d2e-bb81-50f382f3e4e4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-74e1-b148-3986f4b03ffe" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7d2e-bb81-50f382f3e4e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-785c-93f2-cb65553c45a1" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-7d2e-bb81-50f382f3e4e4" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-785c-93f2-cb65553c45a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTextBlock_019eb6a1-1afb-7853-9bc2-5d47d7e25bc2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7bc7-a312-4eeee9fa0938" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTextBlock_019eb6a1-1afb-7853-9bc2-5d47d7e25bc2" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/SummaryofSignificantAccountingPolicies" xlink:type="simple" xlink:href="gd-20260617.xsd#SummaryofSignificantAccountingPolicies"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/SummaryofSignificantAccountingPolicies" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019eb6a1-1afb-7d97-b119-f58c199b7f15" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019eb6a1-1afb-7701-b3e7-7e50b2e3202c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019eb6a1-1afb-7d97-b119-f58c199b7f15" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019eb6a1-1afb-7701-b3e7-7e50b2e3202c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-748d-90d1-d2c6a3d2347a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019eb6a1-1afb-7701-b3e7-7e50b2e3202c" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-748d-90d1-d2c6a3d2347a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-748d-90d1-d2c6a3d2347a_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-748d-90d1-d2c6a3d2347a" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-748d-90d1-d2c6a3d2347a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7963-9b26-4ad70c2fd28d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-748d-90d1-d2c6a3d2347a" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7963-9b26-4ad70c2fd28d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-7260-9395-dba011939870" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-7963-9b26-4ad70c2fd28d" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-7260-9395-dba011939870" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanSummaryOfAccountingPolicyTextBlock_019eb6a1-1afb-7d35-95da-32eda005950e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanSummaryOfAccountingPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019eb6a1-1afb-7d97-b119-f58c199b7f15" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanSummaryOfAccountingPolicyTextBlock_019eb6a1-1afb-7d35-95da-32eda005950e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/TaxStatus" xlink:type="simple" xlink:href="gd-20260617.xsd#TaxStatus"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/TaxStatus" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusLineItems_019eb6a1-1afb-7dc1-865d-d1b3b855f74f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanTaxStatusLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTable_019eb6a1-1afb-75e1-b2b3-ce72af2b5f2f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanTaxStatusTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusLineItems_019eb6a1-1afb-7dc1-865d-d1b3b855f74f" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTable_019eb6a1-1afb-75e1-b2b3-ce72af2b5f2f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-7a80-ac98-0cb5469982f9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTable_019eb6a1-1afb-75e1-b2b3-ce72af2b5f2f" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-7a80-ac98-0cb5469982f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7a80-ac98-0cb5469982f9_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7a80-ac98-0cb5469982f9" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7a80-ac98-0cb5469982f9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7d7a-bd87-344c12e7a61d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7a80-ac98-0cb5469982f9" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7d7a-bd87-344c12e7a61d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-71db-8a9a-9220e6e4d5d9" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-7d7a-bd87-344c12e7a61d" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-71db-8a9a-9220e6e4d5d9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTextBlock_019eb6a1-1afb-740f-9940-1248aa0e0c0c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanTaxStatusTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusLineItems_019eb6a1-1afb-7dc1-865d-d1b3b855f74f" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTextBlock_019eb6a1-1afb-740f-9940-1248aa0e0c0c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/Investments" xlink:type="simple" xlink:href="gd-20260617.xsd#Investments"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/Investments" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-726d-ab08-b1acaccc94c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-7ced-980a-98c6dda29fc1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-726d-ab08-b1acaccc94c3" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-7ced-980a-98c6dda29fc1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-7eed-a9d0-85cd7f487d36" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-7ced-980a-98c6dda29fc1" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-7eed-a9d0-85cd7f487d36" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7eed-a9d0-85cd7f487d36_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7eed-a9d0-85cd7f487d36" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7eed-a9d0-85cd7f487d36_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-72bb-968e-699c2c0a4438" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7eed-a9d0-85cd7f487d36" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-72bb-968e-699c2c0a4438" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-7436-81e4-fe1df2ccebaa" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-72bb-968e-699c2c0a4438" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-7436-81e4-fe1df2ccebaa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTextBlock_019eb6a1-1afb-7e36-994f-5aca2db3078b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-726d-ab08-b1acaccc94c3" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTextBlock_019eb6a1-1afb-7e36-994f-5aca2db3078b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/PlanTermination" xlink:type="simple" xlink:href="gd-20260617.xsd#PlanTermination"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/PlanTermination" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7ba9-8a3f-0626f843cbb2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019eb6a1-1afb-7ace-9172-b304a254ddff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7ba9-8a3f-0626f843cbb2" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019eb6a1-1afb-7ace-9172-b304a254ddff" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-7015-89d8-74aac6cac1e8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019eb6a1-1afb-7ace-9172-b304a254ddff" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-7015-89d8-74aac6cac1e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7015-89d8-74aac6cac1e8_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7015-89d8-74aac6cac1e8" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7015-89d8-74aac6cac1e8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7cd8-91a0-f0df3399dbe6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7015-89d8-74aac6cac1e8" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7cd8-91a0-f0df3399dbe6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-7d2a-bce6-48904ff9cf28" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-7cd8-91a0-f0df3399dbe6" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-7d2a-bce6-48904ff9cf28" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanPlanTerminationTextBlock_019eb6a1-1afb-7620-9e61-c54cdd889253" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanPlanTerminationTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7ba9-8a3f-0626f843cbb2" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanPlanTerminationTextBlock_019eb6a1-1afb-7620-9e61-c54cdd889253" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/PartyinInterestTransactions" xlink:type="simple" xlink:href="gd-20260617.xsd#PartyinInterestTransactions"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/PartyinInterestTransactions" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems_019eb6a1-1afb-7927-8b17-ba3e22c5099e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable_019eb6a1-1afb-7448-864e-7a19480833c9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems_019eb6a1-1afb-7927-8b17-ba3e22c5099e" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable_019eb6a1-1afb-7448-864e-7a19480833c9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-7d54-b7f7-6247e8323d53" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable_019eb6a1-1afb-7448-864e-7a19480833c9" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-7d54-b7f7-6247e8323d53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7d54-b7f7-6247e8323d53_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7d54-b7f7-6247e8323d53" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7d54-b7f7-6247e8323d53_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-76cd-a4d9-f531cc12f204" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7d54-b7f7-6247e8323d53" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-76cd-a4d9-f531cc12f204" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-786c-9130-d481d56e5277" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-76cd-a4d9-f531cc12f204" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-786c-9130-d481d56e5277" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTextBlock_019eb6a1-1afb-7277-bcda-7455f775d4bc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems_019eb6a1-1afb-7927-8b17-ba3e22c5099e" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTextBlock_019eb6a1-1afb-7277-bcda-7455f775d4bc" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/ReconciliationofFinancialStatementstoForm5500" xlink:type="simple" xlink:href="gd-20260617.xsd#ReconciliationofFinancialStatementstoForm5500"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/ReconciliationofFinancialStatementstoForm5500" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019eb6a1-1afb-7f3b-972a-b0b39c1c4169" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019eb6a1-1afb-7bd9-901b-78f3627c19ea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019eb6a1-1afb-7f3b-972a-b0b39c1c4169" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019eb6a1-1afb-7bd9-901b-78f3627c19ea" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-790a-88a4-644b45646510" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019eb6a1-1afb-7bd9-901b-78f3627c19ea" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-790a-88a4-644b45646510" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-790a-88a4-644b45646510_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-790a-88a4-644b45646510" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-790a-88a4-644b45646510_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7d2a-826d-690cb64c2f15" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-790a-88a4-644b45646510" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7d2a-826d-690cb64c2f15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-780f-a289-3fbd7b50b9a0" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-7d2a-826d-690cb64c2f15" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-780f-a289-3fbd7b50b9a0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500TextBlock_019eb6a1-1afb-75e6-9cf6-14efd604ff76" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500TextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019eb6a1-1afb-7f3b-972a-b0b39c1c4169" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500TextBlock_019eb6a1-1afb-75e6-9cf6-14efd604ff76" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/SubsequentEvents" xlink:type="simple" xlink:href="gd-20260617.xsd#SubsequentEvents"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/SubsequentEvents" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EbpSubsequentEventLineItems_019eb6a1-1afb-7762-9f67-dccfc0d41198" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EbpSubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EbpSubsequentEventTable_019eb6a1-1afb-75d9-98c9-74a9db84a928" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EbpSubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EbpSubsequentEventLineItems_019eb6a1-1afb-7762-9f67-dccfc0d41198" xlink:to="loc_us-gaap-ebp_EbpSubsequentEventTable_019eb6a1-1afb-75d9-98c9-74a9db84a928" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-7500-9aaf-bdf8f7e69b37" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EbpSubsequentEventTable_019eb6a1-1afb-75d9-98c9-74a9db84a928" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-7500-9aaf-bdf8f7e69b37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7500-9aaf-bdf8f7e69b37_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7500-9aaf-bdf8f7e69b37" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7500-9aaf-bdf8f7e69b37_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-70b5-a966-84683b2b9755" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7500-9aaf-bdf8f7e69b37" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-70b5-a966-84683b2b9755" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-7e2c-a6d8-9c75c00940b2" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-70b5-a966-84683b2b9755" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-7e2c-a6d8-9c75c00940b2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanSubsequentEventTextBlock_019eb6a1-1afb-7408-85c5-4568a748cfe3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanSubsequentEventTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EbpSubsequentEventLineItems_019eb6a1-1afb-7762-9f67-dccfc0d41198" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanSubsequentEventTextBlock_019eb6a1-1afb-7408-85c5-4568a748cfe3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/ScheduleHLine4aScheduleofDelinquentParticipantContributions" xlink:type="simple" xlink:href="gd-20260617.xsd#ScheduleHLine4aScheduleofDelinquentParticipantContributions"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/ScheduleHLine4aScheduleofDelinquentParticipantContributions" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionLineItems_019eb6a1-1afb-7531-8b72-6dc0a1a7f1b0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTable_019eb6a1-1afb-7e5e-bd13-1af240d11658" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionLineItems_019eb6a1-1afb-7531-8b72-6dc0a1a7f1b0" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTable_019eb6a1-1afb-7e5e-bd13-1af240d11658" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-7874-89e0-d2210ecdf5ea" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTable_019eb6a1-1afb-7e5e-bd13-1af240d11658" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-7874-89e0-d2210ecdf5ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7874-89e0-d2210ecdf5ea_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7874-89e0-d2210ecdf5ea" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7874-89e0-d2210ecdf5ea_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7ae5-ac28-4ddabd037401" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7874-89e0-d2210ecdf5ea" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7ae5-ac28-4ddabd037401" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-79d4-911e-a1d83f839706" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-7ae5-ac28-4ddabd037401" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-79d4-911e-a1d83f839706" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTableTextBlock_019eb6a1-1afb-701a-a22a-dd6efe9a933a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionLineItems_019eb6a1-1afb-7531-8b72-6dc0a1a7f1b0" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTableTextBlock_019eb6a1-1afb-701a-a22a-dd6efe9a933a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/ScheduleHLine4iScheduleofAssetsHeldatEndofYear" xlink:type="simple" xlink:href="gd-20260617.xsd#ScheduleHLine4iScheduleofAssetsHeldatEndofYear"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/ScheduleHLine4iScheduleofAssetsHeldatEndofYear" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019eb6a1-1afb-766d-8ccf-d9f985757b3d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable_019eb6a1-1afb-7c77-ad91-52613209cf69" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019eb6a1-1afb-766d-8ccf-d9f985757b3d" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable_019eb6a1-1afb-7c77-ad91-52613209cf69" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-71cf-b96b-61e9b5437ce1" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable_019eb6a1-1afb-7c77-ad91-52613209cf69" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-71cf-b96b-61e9b5437ce1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-71cf-b96b-61e9b5437ce1_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-71cf-b96b-61e9b5437ce1" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-71cf-b96b-61e9b5437ce1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-76f4-a37e-f51787153e39" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-71cf-b96b-61e9b5437ce1" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-76f4-a37e-f51787153e39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-7792-8e89-7745075b0123" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-76f4-a37e-f51787153e39" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-7792-8e89-7745075b0123" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTableTextBlock_019eb6a1-1afb-7683-86c2-f38107f3c453" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019eb6a1-1afb-766d-8ccf-d9f985757b3d" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTableTextBlock_019eb6a1-1afb-7683-86c2-f38107f3c453" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/SummaryofSignificantAccountingPoliciesPolicies" xlink:type="simple" xlink:href="gd-20260617.xsd#SummaryofSignificantAccountingPoliciesPolicies"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/SummaryofSignificantAccountingPoliciesPolicies" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019eb6a1-1afb-7188-8f3e-849bb05c611c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019eb6a1-1afb-7eb7-bc1b-d09d7b806adb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019eb6a1-1afb-7188-8f3e-849bb05c611c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019eb6a1-1afb-7eb7-bc1b-d09d7b806adb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-7aa9-8ec9-c0a8a222d0aa" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019eb6a1-1afb-7eb7-bc1b-d09d7b806adb" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-7aa9-8ec9-c0a8a222d0aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7aa9-8ec9-c0a8a222d0aa_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7aa9-8ec9-c0a8a222d0aa" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7aa9-8ec9-c0a8a222d0aa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7594-bcde-6026d34e9f80" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7aa9-8ec9-c0a8a222d0aa" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7594-bcde-6026d34e9f80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-736d-9fff-2c8746562b8f" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-7594-bcde-6026d34e9f80" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-736d-9fff-2c8746562b8f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanBasisOfAccountingPolicyTextBlock_019eb6a1-1afb-75b9-82e3-a245b0a6e982" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanBasisOfAccountingPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019eb6a1-1afb-7188-8f3e-849bb05c611c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanBasisOfAccountingPolicyTextBlock_019eb6a1-1afb-75b9-82e3-a245b0a6e982" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPolicyTextBlock_019eb6a1-1afb-70ff-8fad-6cd5b6a927c7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019eb6a1-1afb-7188-8f3e-849bb05c611c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPolicyTextBlock_019eb6a1-1afb-70ff-8fad-6cd5b6a927c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanPaymentToParticipantPolicyTextBlock_019eb6a1-1afb-7971-8c41-8fc449281619" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanPaymentToParticipantPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019eb6a1-1afb-7188-8f3e-849bb05c611c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanPaymentToParticipantPolicyTextBlock_019eb6a1-1afb-7971-8c41-8fc449281619" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanUseOfEstimatePolicyTextBlock_019eb6a1-1afb-75eb-93c9-3cacec432b03" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanUseOfEstimatePolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019eb6a1-1afb-7188-8f3e-849bb05c611c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanUseOfEstimatePolicyTextBlock_019eb6a1-1afb-75eb-93c9-3cacec432b03" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanExpensePolicyTextBlock_019eb6a1-1afb-77c5-ba9c-5ea07d693033" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanExpensePolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019eb6a1-1afb-7188-8f3e-849bb05c611c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanExpensePolicyTextBlock_019eb6a1-1afb-77c5-ba9c-5ea07d693033" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/InvestmentsTables" xlink:type="simple" xlink:href="gd-20260617.xsd#InvestmentsTables"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/InvestmentsTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-7687-8e6c-64a402cab914" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-7259-a7d1-8e72934bac59" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-7687-8e6c-64a402cab914" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-7259-a7d1-8e72934bac59" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-787b-b70e-c35ece9db33e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-7259-a7d1-8e72934bac59" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-787b-b70e-c35ece9db33e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-787b-b70e-c35ece9db33e_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-787b-b70e-c35ece9db33e" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-787b-b70e-c35ece9db33e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-783f-8f15-a3c365b6f2bb" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-787b-b70e-c35ece9db33e" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-783f-8f15-a3c365b6f2bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-7293-a236-05bf13bf6ee2" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-783f-8f15-a3c365b6f2bb" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-7293-a236-05bf13bf6ee2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTableTextBlock_019eb6a1-1afb-795d-9edd-c59f945842ac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-7687-8e6c-64a402cab914" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTableTextBlock_019eb6a1-1afb-795d-9edd-c59f945842ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTableTextBlock_019eb6a1-1afb-7473-9849-850f9e0293b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-7687-8e6c-64a402cab914" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTableTextBlock_019eb6a1-1afb-7473-9849-850f9e0293b7" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/ReconciliationofFinancialStatementstoForm5500Tables" xlink:type="simple" xlink:href="gd-20260617.xsd#ReconciliationofFinancialStatementstoForm5500Tables"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/ReconciliationofFinancialStatementstoForm5500Tables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019eb6a1-1afb-7ee6-9c92-f603a5e040f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019eb6a1-1afb-739a-83c4-2a232f2b9379" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019eb6a1-1afb-7ee6-9c92-f603a5e040f8" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019eb6a1-1afb-739a-83c4-2a232f2b9379" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-752e-a7cf-e863684733b9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019eb6a1-1afb-739a-83c4-2a232f2b9379" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-752e-a7cf-e863684733b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-752e-a7cf-e863684733b9_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-752e-a7cf-e863684733b9" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-752e-a7cf-e863684733b9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7783-82ce-0e7d791d742d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-752e-a7cf-e863684733b9" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7783-82ce-0e7d791d742d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-7479-b9cf-96d713d12fef" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-7783-82ce-0e7d791d742d" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-7479-b9cf-96d713d12fef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500TableTextBlock_019eb6a1-1afb-767f-9522-b364eca3081b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500TableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019eb6a1-1afb-7ee6-9c92-f603a5e040f8" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500TableTextBlock_019eb6a1-1afb-767f-9522-b364eca3081b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/PlanDescriptionDetails" xlink:type="simple" xlink:href="gd-20260617.xsd#PlanDescriptionDetails"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/PlanDescriptionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019eb6a1-1afb-735d-b740-2ce4bca222da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019eb6a1-1afb-735d-b740-2ce4bca222da" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-7647-a3fd-d70beba61c05" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019eb6a1-1afb-735d-b740-2ce4bca222da" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-7647-a3fd-d70beba61c05" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7647-a3fd-d70beba61c05_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7647-a3fd-d70beba61c05" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7647-a3fd-d70beba61c05_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-705d-b784-37c4926c8b1e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7647-a3fd-d70beba61c05" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-705d-b784-37c4926c8b1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-7646-af3b-1319f82d3ee1" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-705d-b784-37c4926c8b1e" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-7646-af3b-1319f82d3ee1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019eb6a1-1afb-7ef5-a487-f6f068ce80c8" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019eb6a1-1afb-735d-b740-2ce4bca222da" xlink:to="loc_srt_RangeAxis_019eb6a1-1afb-7ef5-a487-f6f068ce80c8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019eb6a1-1afb-7ef5-a487-f6f068ce80c8_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019eb6a1-1afb-7ef5-a487-f6f068ce80c8" xlink:to="loc_srt_RangeMember_019eb6a1-1afb-7ef5-a487-f6f068ce80c8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019eb6a1-1afb-79e4-9c30-0a7635a22a01" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019eb6a1-1afb-7ef5-a487-f6f068ce80c8" xlink:to="loc_srt_RangeMember_019eb6a1-1afb-79e4-9c30-0a7635a22a01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019eb6a1-1afb-7221-b9e8-0b081b39bca1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019eb6a1-1afb-79e4-9c30-0a7635a22a01" xlink:to="loc_srt_MinimumMember_019eb6a1-1afb-7221-b9e8-0b081b39bca1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019eb6a1-1afb-7fbb-a5c9-4352e0b143ec" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019eb6a1-1afb-79e4-9c30-0a7635a22a01" xlink:to="loc_srt_MaximumMember_019eb6a1-1afb-7fbb-a5c9-4352e0b143ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019eb6a1-1afb-7f52-9405-d57235d28832" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019eb6a1-1afb-735d-b740-2ce4bca222da" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019eb6a1-1afb-7f52-9405-d57235d28832" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-7f52-9405-d57235d28832_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019eb6a1-1afb-7f52-9405-d57235d28832" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-7f52-9405-d57235d28832_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-78c2-8d96-5d6c28eee20a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019eb6a1-1afb-7f52-9405-d57235d28832" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-78c2-8d96-5d6c28eee20a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustMember_019eb6a1-1afb-75c8-8cee-1b958327548c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-78c2-8d96-5d6c28eee20a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustMember_019eb6a1-1afb-75c8-8cee-1b958327548c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPMinimumAgeForParticipationInPlan_019eb6a1-1afb-780b-91ee-cacd84573342" xlink:href="gd-20260617.xsd#gd_EBPMinimumAgeForParticipationInPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:to="loc_gd_EBPMinimumAgeForParticipationInPlan_019eb6a1-1afb-780b-91ee-cacd84573342" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPParticipantContributionMaximumContributionToEligibleCompensationPercentage_019eb6a1-1afb-74f7-a0a9-f27484fc7062" xlink:href="gd-20260617.xsd#gd_EBPParticipantContributionMaximumContributionToEligibleCompensationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:to="loc_gd_EBPParticipantContributionMaximumContributionToEligibleCompensationPercentage_019eb6a1-1afb-74f7-a0a9-f27484fc7062" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate_019eb6a1-1afb-7a2d-bc84-fdc767537aff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate_019eb6a1-1afb-7a2d-bc84-fdc767537aff" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionMatchingPercentage_019eb6a1-1afb-76fd-bf22-85097434c49a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanEmployerContributionMatchingPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionMatchingPercentage_019eb6a1-1afb-76fd-bf22-85097434c49a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage_019eb6a1-1afb-73b7-95d0-ab97803b6b4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage_019eb6a1-1afb-73b7-95d0-ab97803b6b4e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPEmployerDiscretionaryContributionAmount_019eb6a1-1afb-723e-9ca3-00d0a0a86db3" xlink:href="gd-20260617.xsd#gd_EBPEmployerDiscretionaryContributionAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:to="loc_gd_EBPEmployerDiscretionaryContributionAmount_019eb6a1-1afb-723e-9ca3-00d0a0a86db3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPParticipantContributionsSafeHarborEmployerContributionsAndEarningsVestingPercentage_019eb6a1-1afb-79c1-99de-69b748b625bf" xlink:href="gd-20260617.xsd#gd_EBPParticipantContributionsSafeHarborEmployerContributionsAndEarningsVestingPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:to="loc_gd_EBPParticipantContributionsSafeHarborEmployerContributionsAndEarningsVestingPercentage_019eb6a1-1afb-79c1-99de-69b748b625bf" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPEmployerContributionVestingServicePeriod_019eb6a1-1afb-77d4-977a-390603342dea" xlink:href="gd-20260617.xsd#gd_EBPEmployerContributionVestingServicePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:to="loc_gd_EBPEmployerContributionVestingServicePeriod_019eb6a1-1afb-77d4-977a-390603342dea" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount_019eb6a1-1afb-7cd4-b4da-dfb3da7ff214" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount_019eb6a1-1afb-7cd4-b4da-dfb3da7ff214" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage_019eb6a1-1afb-7961-8d43-01a7964f12ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage_019eb6a1-1afb-7961-8d43-01a7964f12ae" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPNoteReceivableFromParticipantGeneralLoanMaximumBorrowingTerm_019eb6a1-1afb-701f-997b-9ee97a0d51b8" xlink:href="gd-20260617.xsd#gd_EBPNoteReceivableFromParticipantGeneralLoanMaximumBorrowingTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:to="loc_gd_EBPNoteReceivableFromParticipantGeneralLoanMaximumBorrowingTerm_019eb6a1-1afb-701f-997b-9ee97a0d51b8" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPNoteReceivableFromParticipantAccountPrimaryResidenceBorrowingTerm_019eb6a1-1afb-76c3-bc54-268b2126b57d" xlink:href="gd-20260617.xsd#gd_EBPNoteReceivableFromParticipantAccountPrimaryResidenceBorrowingTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:to="loc_gd_EBPNoteReceivableFromParticipantAccountPrimaryResidenceBorrowingTerm_019eb6a1-1afb-76c3-bc54-268b2126b57d" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPNoteReceivableFromParticipantMaximumNumberOfNotesOutstanding_019eb6a1-1afb-7145-b213-0df40c7678e4" xlink:href="gd-20260617.xsd#gd_EBPNoteReceivableFromParticipantMaximumNumberOfNotesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:to="loc_gd_EBPNoteReceivableFromParticipantMaximumNumberOfNotesOutstanding_019eb6a1-1afb-7145-b213-0df40c7678e4" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPNoteReceivableFromParticipantPrimaryResidenceNumberOfNotesOutstanding_019eb6a1-1afb-7520-9c63-ac906638ed21" xlink:href="gd-20260617.xsd#gd_EBPNoteReceivableFromParticipantPrimaryResidenceNumberOfNotesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:to="loc_gd_EBPNoteReceivableFromParticipantPrimaryResidenceNumberOfNotesOutstanding_019eb6a1-1afb-7520-9c63-ac906638ed21" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPParticipantLoanBasisSpreadOnVariableRate_019eb6a1-1afb-7da0-8a1e-4e43b35d2524" xlink:href="gd-20260617.xsd#gd_EBPParticipantLoanBasisSpreadOnVariableRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:to="loc_gd_EBPParticipantLoanBasisSpreadOnVariableRate_019eb6a1-1afb-7da0-8a1e-4e43b35d2524" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPChangeInNetAssetAvailableForBenefitParticipantAccountBalanceTransferToFromPlan_019eb6a1-1afb-7df8-9a32-52a0c81791c0" xlink:href="gd-20260617.xsd#gd_EBPChangeInNetAssetAvailableForBenefitParticipantAccountBalanceTransferToFromPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:to="loc_gd_EBPChangeInNetAssetAvailableForBenefitParticipantAccountBalanceTransferToFromPlan_019eb6a1-1afb-7df8-9a32-52a0c81791c0" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPChangeInNetAssetAvailableForBenefitNotesReceivableAccountBalanceTransferToFromPlan_019eb6a1-1afb-70f3-a1b4-f1eb3fa2ae16" xlink:href="gd-20260617.xsd#gd_EBPChangeInNetAssetAvailableForBenefitNotesReceivableAccountBalanceTransferToFromPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019eb6a1-1afb-7f42-9b0f-3cfd5121999b" xlink:to="loc_gd_EBPChangeInNetAssetAvailableForBenefitNotesReceivableAccountBalanceTransferToFromPlan_019eb6a1-1afb-70f3-a1b4-f1eb3fa2ae16" xlink:type="arc" order="16"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/SummaryofSignificantAccountingPoliciesDetails" xlink:type="simple" xlink:href="gd-20260617.xsd#SummaryofSignificantAccountingPoliciesDetails"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/SummaryofSignificantAccountingPoliciesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019eb6a1-1afb-788c-8d27-78e7dae40b32" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019eb6a1-1afb-724c-939d-b106854bbffb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019eb6a1-1afb-788c-8d27-78e7dae40b32" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019eb6a1-1afb-724c-939d-b106854bbffb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-7836-8821-f2c7b441b61b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019eb6a1-1afb-724c-939d-b106854bbffb" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-7836-8821-f2c7b441b61b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7836-8821-f2c7b441b61b_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7836-8821-f2c7b441b61b" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7836-8821-f2c7b441b61b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7593-bc56-f5a5e7a4d4c1" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7836-8821-f2c7b441b61b" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7593-bc56-f5a5e7a4d4c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-77f6-b4bc-6616e3ef993f" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-7593-bc56-f5a5e7a4d4c1" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-77f6-b4bc-6616e3ef993f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019eb6a1-1afb-7427-87c1-e40da4c70ca1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019eb6a1-1afb-724c-939d-b106854bbffb" xlink:to="loc_us-gaap_InvestmentTypeAxis_019eb6a1-1afb-7427-87c1-e40da4c70ca1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7427-87c1-e40da4c70ca1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019eb6a1-1afb-7427-87c1-e40da4c70ca1" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7427-87c1-e40da4c70ca1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-78b6-914d-b77200399a49" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019eb6a1-1afb-7427-87c1-e40da4c70ca1" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-78b6-914d-b77200399a49" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember_019eb6a1-1afb-718d-91a1-991811dcbccb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-78b6-914d-b77200399a49" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember_019eb6a1-1afb-718d-91a1-991811dcbccb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInterestInMasterTrustPercentage_019eb6a1-1afb-7cdf-8a38-f211a40e1721" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInterestInMasterTrustPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019eb6a1-1afb-788c-8d27-78e7dae40b32" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInterestInMasterTrustPercentage_019eb6a1-1afb-7cdf-8a38-f211a40e1721" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/InvestmentsScheduleofNetAssetsDetails" xlink:type="simple" xlink:href="gd-20260617.xsd#InvestmentsScheduleofNetAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/InvestmentsScheduleofNetAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-7277-8a6a-7fce24e9a737" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-71f6-8e1a-a53ae128a3a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-7277-8a6a-7fce24e9a737" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-71f6-8e1a-a53ae128a3a7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-786f-be13-36270bbb736b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-71f6-8e1a-a53ae128a3a7" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-786f-be13-36270bbb736b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-786f-be13-36270bbb736b_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-786f-be13-36270bbb736b" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-786f-be13-36270bbb736b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-754e-9641-321a115cd457" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-786f-be13-36270bbb736b" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-754e-9641-321a115cd457" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-7b03-bf80-2af0a088b438" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-754e-9641-321a115cd457" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-7b03-bf80-2af0a088b438" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019eb6a1-1afb-74c9-9488-d55d3df845f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-71f6-8e1a-a53ae128a3a7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019eb6a1-1afb-74c9-9488-d55d3df845f9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-74c9-9488-d55d3df845f9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019eb6a1-1afb-74c9-9488-d55d3df845f9" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-74c9-9488-d55d3df845f9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-7cb7-b5ba-7a3af29be63b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019eb6a1-1afb-74c9-9488-d55d3df845f9" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-7cb7-b5ba-7a3af29be63b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustMember_019eb6a1-1afb-7ad1-8f05-7d94e2b878a0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-7cb7-b5ba-7a3af29be63b" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustMember_019eb6a1-1afb-7ad1-8f05-7d94e2b878a0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedPlanInterestInMasterTrustMember_019eb6a1-1afb-704a-9832-49d6704a2d9b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedPlanInterestInMasterTrustMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-7cb7-b5ba-7a3af29be63b" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedPlanInterestInMasterTrustMember_019eb6a1-1afb-704a-9832-49d6704a2d9b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019eb6a1-1afb-7744-9fa0-04f0be97e818" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-71f6-8e1a-a53ae128a3a7" xlink:to="loc_us-gaap_InvestmentTypeAxis_019eb6a1-1afb-7744-9fa0-04f0be97e818" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7744-9fa0-04f0be97e818_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019eb6a1-1afb-7744-9fa0-04f0be97e818" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7744-9fa0-04f0be97e818_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7953-bae2-482813630d60" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019eb6a1-1afb-7744-9fa0-04f0be97e818" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7953-bae2-482813630d60" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanSelfDirectedBrokerageAccountMember_019eb6a1-1afb-7dc4-a57a-9570b4509cb5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanSelfDirectedBrokerageAccountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7953-bae2-482813630d60" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanSelfDirectedBrokerageAccountMember_019eb6a1-1afb-7dc4-a57a-9570b4509cb5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember_019eb6a1-1afb-77fe-bfa7-8bd209414d82" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7953-bae2-482813630d60" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember_019eb6a1-1afb-77fe-bfa7-8bd209414d82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAggregatedInvestmentsMember_019eb6a1-1afb-7242-9e95-696485d2d05c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAggregatedInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7953-bae2-482813630d60" xlink:to="loc_us-gaap_OtherAggregatedInvestmentsMember_019eb6a1-1afb-7242-9e95-696485d2d05c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPRegisteredInvestmentCompaniesMember_019eb6a1-1afb-7154-ab5a-f9949c72cae6" xlink:href="gd-20260617.xsd#gd_EBPRegisteredInvestmentCompaniesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7953-bae2-482813630d60" xlink:to="loc_gd_EBPRegisteredInvestmentCompaniesMember_019eb6a1-1afb-7154-ab5a-f9949c72cae6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestBearingDepositsMember_019eb6a1-1afb-73ee-a4de-ab9318dc61da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestBearingDepositsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7953-bae2-482813630d60" xlink:to="loc_us-gaap_InterestBearingDepositsMember_019eb6a1-1afb-73ee-a4de-ab9318dc61da" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPOvernightDepositAccountsMember_019eb6a1-1afb-7806-bafe-82b29e113f39" xlink:href="gd-20260617.xsd#gd_EBPOvernightDepositAccountsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7953-bae2-482813630d60" xlink:to="loc_gd_EBPOvernightDepositAccountsMember_019eb6a1-1afb-7806-bafe-82b29e113f39" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember_019eb6a1-1afb-77ba-b82b-9cc5d77d5754" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7953-bae2-482813630d60" xlink:to="loc_us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember_019eb6a1-1afb-77ba-b82b-9cc5d77d5754" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_019eb6a1-1afb-7325-a7e5-82f82fbb2c04" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USTreasuryAndGovernmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7953-bae2-482813630d60" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_019eb6a1-1afb-7325-a7e5-82f82fbb2c04" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPMortgageAndAssetBackedSecuritiesMember_019eb6a1-1afb-766e-b6a6-5cc4f8254ecb" xlink:href="gd-20260617.xsd#gd_EBPMortgageAndAssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7953-bae2-482813630d60" xlink:to="loc_gd_EBPMortgageAndAssetBackedSecuritiesMember_019eb6a1-1afb-766e-b6a6-5cc4f8254ecb" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPForeignGovernmentSecuritiesMember_019eb6a1-1afb-7ab4-8397-6659432f31a2" xlink:href="gd-20260617.xsd#gd_EBPForeignGovernmentSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7953-bae2-482813630d60" xlink:to="loc_gd_EBPForeignGovernmentSecuritiesMember_019eb6a1-1afb-7ab4-8397-6659432f31a2" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019eb6a1-1afb-7ba1-89d3-195cfe2b2564" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7953-bae2-482813630d60" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019eb6a1-1afb-7ba1-89d3-195cfe2b2564" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValue_019eb6a1-1afb-792b-ad71-baf9dc98df1b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-7277-8a6a-7fce24e9a737" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValue_019eb6a1-1afb-792b-ad71-baf9dc98df1b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentContractValue_019eb6a1-1afb-7e1c-b109-2086c2a31173" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentContractValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-7277-8a6a-7fce24e9a737" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentContractValue_019eb6a1-1afb-7e1c-b109-2086c2a31173" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanCash_019eb6a1-1afb-76e2-8d46-eb89c69f454c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-7277-8a6a-7fce24e9a737" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanCash_019eb6a1-1afb-76e2-8d46-eb89c69f454c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPNetPendingTradesPayablesAndInterestReceivable_019eb6a1-1afb-7ec6-af4e-0fc9a7f9eda9" xlink:href="gd-20260617.xsd#gd_EBPNetPendingTradesPayablesAndInterestReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-7277-8a6a-7fce24e9a737" xlink:to="loc_gd_EBPNetPendingTradesPayablesAndInterestReceivable_019eb6a1-1afb-7ec6-af4e-0fc9a7f9eda9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019eb6a1-1afb-73d8-b4fc-c8f38d0fbb2a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-7277-8a6a-7fce24e9a737" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019eb6a1-1afb-73d8-b4fc-c8f38d0fbb2a" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/InvestmentsScheduleofChangesinNetAssetsofMasterTrustDetails" xlink:type="simple" xlink:href="gd-20260617.xsd#InvestmentsScheduleofChangesinNetAssetsofMasterTrustDetails"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/InvestmentsScheduleofChangesinNetAssetsofMasterTrustDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-73c9-a171-b6e53e7d4c09" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-76b2-903d-e238c469425d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-73c9-a171-b6e53e7d4c09" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-76b2-903d-e238c469425d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019eb6a1-1afb-7d4c-95fd-9d8e0535b17f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-76b2-903d-e238c469425d" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019eb6a1-1afb-7d4c-95fd-9d8e0535b17f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-7d4c-95fd-9d8e0535b17f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019eb6a1-1afb-7d4c-95fd-9d8e0535b17f" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-7d4c-95fd-9d8e0535b17f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-7407-99c4-5d33f55c6785" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019eb6a1-1afb-7d4c-95fd-9d8e0535b17f" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-7407-99c4-5d33f55c6785" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustMember_019eb6a1-1afb-7e24-9acd-4fd04b94496e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-7407-99c4-5d33f55c6785" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustMember_019eb6a1-1afb-7e24-9acd-4fd04b94496e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-79dd-afa0-e29f4146c60c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-76b2-903d-e238c469425d" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-79dd-afa0-e29f4146c60c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-79dd-afa0-e29f4146c60c_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-79dd-afa0-e29f4146c60c" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-79dd-afa0-e29f4146c60c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-722e-91f4-50680f73710f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-79dd-afa0-e29f4146c60c" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-722e-91f4-50680f73710f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-73a4-b78a-949f5ab25f05" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-722e-91f4-50680f73710f" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-73a4-b78a-949f5ab25f05" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestmentAbstract_019eb6a1-1afb-71d7-ba47-6e52a2860fab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestmentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-73c9-a171-b6e53e7d4c09" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestmentAbstract_019eb6a1-1afb-71d7-ba47-6e52a2860fab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForUnrealizedGainLossOnInvestment_019eb6a1-1afb-7e10-8d8c-c6c16a5f22fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForUnrealizedGainLossOnInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestmentAbstract_019eb6a1-1afb-71d7-ba47-6e52a2860fab" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForUnrealizedGainLossOnInvestment_019eb6a1-1afb-7e10-8d8c-c6c16a5f22fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestAndDividendIncomeOnInvestment_019eb6a1-1afb-7dc5-9311-53b1c0dce2c9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestAndDividendIncomeOnInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestmentAbstract_019eb6a1-1afb-71d7-ba47-6e52a2860fab" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestAndDividendIncomeOnInvestment_019eb6a1-1afb-7dc5-9311-53b1c0dce2c9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestment_019eb6a1-1afb-7b13-9813-0522699ebf05" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestmentAbstract_019eb6a1-1afb-71d7-ba47-6e52a2860fab" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestment_019eb6a1-1afb-7b13-9813-0522699ebf05" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitTransferToFromExternalPlan_019eb6a1-1afb-7c6a-9637-06681afb496b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitTransferToFromExternalPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-73c9-a171-b6e53e7d4c09" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitTransferToFromExternalPlan_019eb6a1-1afb-7c6a-9637-06681afb496b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPChangeInNetAssetAvailableForBenefitIncludingPlanTransfersIncreaseDecrease_019eb6a1-1afb-7e9e-8c06-73d1b4ad65fa" xlink:href="gd-20260617.xsd#gd_EBPChangeInNetAssetAvailableForBenefitIncludingPlanTransfersIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-73c9-a171-b6e53e7d4c09" xlink:to="loc_gd_EBPChangeInNetAssetAvailableForBenefitIncludingPlanTransfersIncreaseDecrease_019eb6a1-1afb-7e9e-8c06-73d1b4ad65fa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseAbstract_019eb6a1-1afb-7e18-b102-7ae77744c20c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-73c9-a171-b6e53e7d4c09" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseAbstract_019eb6a1-1afb-7e18-b102-7ae77744c20c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019eb6a1-1afb-7c14-9f28-890f58edc7e5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseAbstract_019eb6a1-1afb-7e18-b102-7ae77744c20c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019eb6a1-1afb-7c14-9f28-890f58edc7e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019eb6a1-1afb-7490-8076-316d6dca57e7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/InvestmentsScheduleofFairValueHierarchyDetails" xlink:type="simple" xlink:href="gd-20260617.xsd#InvestmentsScheduleofFairValueHierarchyDetails"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/InvestmentsScheduleofFairValueHierarchyDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-7a61-a7b2-7269ddc690cb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-742a-b4b0-00685469f2a9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-7a61-a7b2-7269ddc690cb" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-742a-b4b0-00685469f2a9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019eb6a1-1afb-7681-8407-f6635c408be2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-742a-b4b0-00685469f2a9" xlink:to="loc_us-gaap_InvestmentTypeAxis_019eb6a1-1afb-7681-8407-f6635c408be2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7681-8407-f6635c408be2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019eb6a1-1afb-7681-8407-f6635c408be2" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7681-8407-f6635c408be2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7e2a-b90c-28dbe9f9b6f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019eb6a1-1afb-7681-8407-f6635c408be2" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7e2a-b90c-28dbe9f9b6f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanSelfDirectedBrokerageAccountMember_019eb6a1-1afb-7e58-8ad9-4b02fe10daf5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanSelfDirectedBrokerageAccountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7e2a-b90c-28dbe9f9b6f5" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanSelfDirectedBrokerageAccountMember_019eb6a1-1afb-7e58-8ad9-4b02fe10daf5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember_019eb6a1-1afb-7cea-853a-4af790106d96" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7e2a-b90c-28dbe9f9b6f5" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember_019eb6a1-1afb-7cea-853a-4af790106d96" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAggregatedInvestmentsMember_019eb6a1-1afb-765e-a413-25185b4455b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAggregatedInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7e2a-b90c-28dbe9f9b6f5" xlink:to="loc_us-gaap_OtherAggregatedInvestmentsMember_019eb6a1-1afb-765e-a413-25185b4455b2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPRegisteredInvestmentCompaniesMember_019eb6a1-1afb-7758-a0de-93796f0f83b0" xlink:href="gd-20260617.xsd#gd_EBPRegisteredInvestmentCompaniesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7e2a-b90c-28dbe9f9b6f5" xlink:to="loc_gd_EBPRegisteredInvestmentCompaniesMember_019eb6a1-1afb-7758-a0de-93796f0f83b0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestBearingDepositsMember_019eb6a1-1afb-775f-b894-7f8ea0d12946" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestBearingDepositsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7e2a-b90c-28dbe9f9b6f5" xlink:to="loc_us-gaap_InterestBearingDepositsMember_019eb6a1-1afb-775f-b894-7f8ea0d12946" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPOvernightDepositAccountsMember_019eb6a1-1afb-7713-80a2-2c11b0c81570" xlink:href="gd-20260617.xsd#gd_EBPOvernightDepositAccountsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7e2a-b90c-28dbe9f9b6f5" xlink:to="loc_gd_EBPOvernightDepositAccountsMember_019eb6a1-1afb-7713-80a2-2c11b0c81570" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember_019eb6a1-1afb-7cf8-bb01-eeeb18f130b6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7e2a-b90c-28dbe9f9b6f5" xlink:to="loc_us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember_019eb6a1-1afb-7cf8-bb01-eeeb18f130b6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_019eb6a1-1afb-7aae-9b51-e9273e9c9551" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USTreasuryAndGovernmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7e2a-b90c-28dbe9f9b6f5" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_019eb6a1-1afb-7aae-9b51-e9273e9c9551" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPMortgageAndAssetBackedSecuritiesMember_019eb6a1-1afb-7e39-9ad0-5c0681f0cb37" xlink:href="gd-20260617.xsd#gd_EBPMortgageAndAssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7e2a-b90c-28dbe9f9b6f5" xlink:to="loc_gd_EBPMortgageAndAssetBackedSecuritiesMember_019eb6a1-1afb-7e39-9ad0-5c0681f0cb37" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPForeignGovernmentSecuritiesMember_019eb6a1-1afb-79fa-a225-3f6ced6c14bc" xlink:href="gd-20260617.xsd#gd_EBPForeignGovernmentSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7e2a-b90c-28dbe9f9b6f5" xlink:to="loc_gd_EBPForeignGovernmentSecuritiesMember_019eb6a1-1afb-79fa-a225-3f6ced6c14bc" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019eb6a1-1afb-7cd6-9d2a-94222ecb3bdc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7e2a-b90c-28dbe9f9b6f5" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019eb6a1-1afb-7cd6-9d2a-94222ecb3bdc" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-7ff4-9870-a69ca67ebf1e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-742a-b4b0-00685469f2a9" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-7ff4-9870-a69ca67ebf1e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7ff4-9870-a69ca67ebf1e_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7ff4-9870-a69ca67ebf1e" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7ff4-9870-a69ca67ebf1e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7c66-84e8-c0914c4321da" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7ff4-9870-a69ca67ebf1e" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7c66-84e8-c0914c4321da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-723f-9006-6f5a84087e91" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-7c66-84e8-c0914c4321da" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-723f-9006-6f5a84087e91" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019eb6a1-1afb-7815-b774-1de378d2b60b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-742a-b4b0-00685469f2a9" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019eb6a1-1afb-7815-b774-1de378d2b60b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb6a1-1afb-7815-b774-1de378d2b60b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019eb6a1-1afb-7815-b774-1de378d2b60b" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb6a1-1afb-7815-b774-1de378d2b60b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb6a1-1afb-7c0c-943b-c6b602e8dab9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019eb6a1-1afb-7815-b774-1de378d2b60b" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb6a1-1afb-7c0c-943b-c6b602e8dab9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019eb6a1-1afb-7c11-a389-6bcb0fe26e45" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb6a1-1afb-7c0c-943b-c6b602e8dab9" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019eb6a1-1afb-7c11-a389-6bcb0fe26e45" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019eb6a1-1afb-74f3-bf1b-96486df6a45f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb6a1-1afb-7c0c-943b-c6b602e8dab9" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019eb6a1-1afb-74f3-bf1b-96486df6a45f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019eb6a1-1afb-7da1-a15d-c95f5cc648ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb6a1-1afb-7c0c-943b-c6b602e8dab9" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019eb6a1-1afb-7da1-a15d-c95f5cc648ad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019eb6a1-1afb-75e0-b79b-a217fe947b2b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019eb6a1-1afb-742a-b4b0-00685469f2a9" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019eb6a1-1afb-75e0-b79b-a217fe947b2b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-75e0-b79b-a217fe947b2b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019eb6a1-1afb-75e0-b79b-a217fe947b2b" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-75e0-b79b-a217fe947b2b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-7be5-9229-4f5f1a6961ec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019eb6a1-1afb-75e0-b79b-a217fe947b2b" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-7be5-9229-4f5f1a6961ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustMember_019eb6a1-1afb-74b2-bd07-a25f228c76fc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019eb6a1-1afb-7be5-9229-4f5f1a6961ec" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustMember_019eb6a1-1afb-74b2-bd07-a25f228c76fc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValue_019eb6a1-1afb-7e4b-ae40-14ddb6bbf5dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019eb6a1-1afb-7a61-a7b2-7269ddc690cb" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValue_019eb6a1-1afb-7e4b-ae40-14ddb6bbf5dc" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/PartyinInterestTransactionsDetails" xlink:type="simple" xlink:href="gd-20260617.xsd#PartyinInterestTransactionsDetails"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/PartyinInterestTransactionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems_019eb6a1-1afb-7d28-8dd6-45bfd3db2be4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable_019eb6a1-1afb-74ff-a5f2-9e19025b69fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems_019eb6a1-1afb-7d28-8dd6-45bfd3db2be4" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable_019eb6a1-1afb-74ff-a5f2-9e19025b69fd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-7069-850c-430677ec13b6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable_019eb6a1-1afb-74ff-a5f2-9e19025b69fd" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-7069-850c-430677ec13b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7069-850c-430677ec13b6_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7069-850c-430677ec13b6" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7069-850c-430677ec13b6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7478-8eed-45d435efbce4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7069-850c-430677ec13b6" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7478-8eed-45d435efbce4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-7a3b-a767-f0d3e47e9294" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-7478-8eed-45d435efbce4" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-7a3b-a767-f0d3e47e9294" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019eb6a1-1afb-7cd1-a133-003052c6d002" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable_019eb6a1-1afb-74ff-a5f2-9e19025b69fd" xlink:to="loc_us-gaap_InvestmentTypeAxis_019eb6a1-1afb-7cd1-a133-003052c6d002" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7cd1-a133-003052c6d002_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019eb6a1-1afb-7cd1-a133-003052c6d002" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7cd1-a133-003052c6d002_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7a67-af17-6d13856b9e30" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019eb6a1-1afb-7cd1-a133-003052c6d002" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7a67-af17-6d13856b9e30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember_019eb6a1-1afb-73c5-9dc1-331abf89f50f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019eb6a1-1afb-7a67-af17-6d13856b9e30" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember_019eb6a1-1afb-73c5-9dc1-331abf89f50f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentNumberOfShares_019eb6a1-1afb-755e-b61b-0ee2188e060e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentNumberOfShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems_019eb6a1-1afb-7d28-8dd6-45bfd3db2be4" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentNumberOfShares_019eb6a1-1afb-755e-b61b-0ee2188e060e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForDividendIncomeOnInvestment_019eb6a1-1afb-79bc-95b0-3d2030a57ede" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForDividendIncomeOnInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems_019eb6a1-1afb-7d28-8dd6-45bfd3db2be4" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForDividendIncomeOnInvestment_019eb6a1-1afb-79bc-95b0-3d2030a57ede" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/ReconciliationofFinancialStatementstoForm5500ReconciliationofNetAssetsAvailableforBenefitDetails" xlink:type="simple" xlink:href="gd-20260617.xsd#ReconciliationofFinancialStatementstoForm5500ReconciliationofNetAssetsAvailableforBenefitDetails"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/ReconciliationofFinancialStatementstoForm5500ReconciliationofNetAssetsAvailableforBenefitDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019eb6a1-1afb-755f-8d75-7500675b4c83" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019eb6a1-1afb-7f64-ac07-402e67497efa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019eb6a1-1afb-755f-8d75-7500675b4c83" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019eb6a1-1afb-7f64-ac07-402e67497efa" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-787e-9b12-eb04d22bb9f0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019eb6a1-1afb-7f64-ac07-402e67497efa" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-787e-9b12-eb04d22bb9f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-787e-9b12-eb04d22bb9f0_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-787e-9b12-eb04d22bb9f0" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-787e-9b12-eb04d22bb9f0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-710c-bb8e-afebe09b4e4a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-787e-9b12-eb04d22bb9f0" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-710c-bb8e-afebe09b4e4a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-7350-a309-4194c17609b3" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-710c-bb8e-afebe09b4e4a" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-7350-a309-4194c17609b3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019eb6a1-1afb-7da6-be36-f13d20950a4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019eb6a1-1afb-755f-8d75-7500675b4c83" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019eb6a1-1afb-7da6-be36-f13d20950a4e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500NetAssetAvailableForBenefitDeemedDistribution_019eb6a1-1afb-7847-b4a6-3e82d6b15bfe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500NetAssetAvailableForBenefitDeemedDistribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019eb6a1-1afb-755f-8d75-7500675b4c83" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500NetAssetAvailableForBenefitDeemedDistribution_019eb6a1-1afb-7847-b4a6-3e82d6b15bfe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionNetAssetAvailableForBenefit_019eb6a1-1afb-75dd-aa64-f7977318dd89" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionNetAssetAvailableForBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019eb6a1-1afb-755f-8d75-7500675b4c83" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionNetAssetAvailableForBenefit_019eb6a1-1afb-75dd-aa64-f7977318dd89" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/ReconciliationofFinancialStatementstoForm5500ReconciliationofNetIncomeDetails" xlink:type="simple" xlink:href="gd-20260617.xsd#ReconciliationofFinancialStatementstoForm5500ReconciliationofNetIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/ReconciliationofFinancialStatementstoForm5500ReconciliationofNetIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019eb6a1-1afb-7d9e-9791-4a0a0270593a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019eb6a1-1afb-74d0-b1a0-b659298f0f7e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019eb6a1-1afb-7d9e-9791-4a0a0270593a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019eb6a1-1afb-74d0-b1a0-b659298f0f7e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-7781-964d-2645072b0192" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019eb6a1-1afb-74d0-b1a0-b659298f0f7e" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-7781-964d-2645072b0192" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7781-964d-2645072b0192_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7781-964d-2645072b0192" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7781-964d-2645072b0192_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7232-a333-d521034be1f5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-7781-964d-2645072b0192" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7232-a333-d521034be1f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-78bb-9972-a592735229e1" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-7232-a333-d521034be1f5" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-78bb-9972-a592735229e1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPChangeInNetAssetAvailableForBenefitIncludingPlanTransfersIncreaseDecrease_019eb6a1-1afb-74e5-88e5-2004f7ce7546" xlink:href="gd-20260617.xsd#gd_EBPChangeInNetAssetAvailableForBenefitIncludingPlanTransfersIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019eb6a1-1afb-7d9e-9791-4a0a0270593a" xlink:to="loc_gd_EBPChangeInNetAssetAvailableForBenefitIncludingPlanTransfersIncreaseDecrease_019eb6a1-1afb-74e5-88e5-2004f7ce7546" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500ChangeInNetAssetAvailableForBenefitDecreaseForDeemedDistributionCurrentPeriod_019eb6a1-1afb-7345-b4db-018c4b6a3075" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500ChangeInNetAssetAvailableForBenefitDecreaseForDeemedDistributionCurrentPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019eb6a1-1afb-7d9e-9791-4a0a0270593a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500ChangeInNetAssetAvailableForBenefitDecreaseForDeemedDistributionCurrentPeriod_019eb6a1-1afb-7345-b4db-018c4b6a3075" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500ChangeInNetAssetAvailableForBenefitIncreaseForDeemedDistributionPriorPeriod_019eb6a1-1afb-72a7-bc6f-3d6b6d1687d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500ChangeInNetAssetAvailableForBenefitIncreaseForDeemedDistributionPriorPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019eb6a1-1afb-7d9e-9791-4a0a0270593a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500ChangeInNetAssetAvailableForBenefitIncreaseForDeemedDistributionPriorPeriod_019eb6a1-1afb-72a7-bc6f-3d6b6d1687d3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionNetIncomeLoss_019eb6a1-1afb-7f7f-8d5f-4c31de9a7f3f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionNetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019eb6a1-1afb-7d9e-9791-4a0a0270593a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionNetIncomeLoss_019eb6a1-1afb-7f7f-8d5f-4c31de9a7f3f" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/ScheduleHLine4aScheduleofDelinquentParticipantContributionsDetails" xlink:type="simple" xlink:href="gd-20260617.xsd#ScheduleHLine4aScheduleofDelinquentParticipantContributionsDetails"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/ScheduleHLine4aScheduleofDelinquentParticipantContributionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionLineItems_019eb6a1-1afb-79a4-ba49-50b8355f6df7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTable_019eb6a1-1afb-7d21-83af-d1e2fa7a8517" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionLineItems_019eb6a1-1afb-79a4-ba49-50b8355f6df7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTable_019eb6a1-1afb-7d21-83af-d1e2fa7a8517" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-75fe-b52a-c4dbf3503135" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTable_019eb6a1-1afb-7d21-83af-d1e2fa7a8517" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-75fe-b52a-c4dbf3503135" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-75fe-b52a-c4dbf3503135_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-75fe-b52a-c4dbf3503135" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-75fe-b52a-c4dbf3503135_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-74b8-9773-544e664a574b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-75fe-b52a-c4dbf3503135" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-74b8-9773-544e664a574b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-7e18-8d8c-bdb50cc7bf44" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-74b8-9773-544e664a574b" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-7e18-8d8c-bdb50cc7bf44" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanPlanNumber_019eb6a1-1afb-73c5-8a04-a2f546d37fa8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanPlanNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionLineItems_019eb6a1-1afb-79a4-ba49-50b8355f6df7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanPlanNumber_019eb6a1-1afb-73c5-8a04-a2f546d37fa8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBPScheduleOfDelinquentParticipantContributionNonexemptProhibitedTransactions_019eb6a1-1afb-7995-9e8d-7d319f6b3ed1" xlink:href="gd-20260617.xsd#gd_EBPScheduleOfDelinquentParticipantContributionNonexemptProhibitedTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionLineItems_019eb6a1-1afb-79a4-ba49-50b8355f6df7" xlink:to="loc_gd_EBPScheduleOfDelinquentParticipantContributionNonexemptProhibitedTransactions_019eb6a1-1afb-7995-9e8d-7d319f6b3ed1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionNotCorrected_019eb6a1-1afb-7d2e-8a8d-acc7650339c7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionNotCorrected"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionLineItems_019eb6a1-1afb-79a4-ba49-50b8355f6df7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionNotCorrected_019eb6a1-1afb-7d2e-8a8d-acc7650339c7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrectedOutsideVfcp_019eb6a1-1afb-7e9a-bc73-af5c1f2c224f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrectedOutsideVfcp"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionLineItems_019eb6a1-1afb-79a4-ba49-50b8355f6df7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrectedOutsideVfcp_019eb6a1-1afb-7e9a-bc73-af5c1f2c224f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionPendingCorrectionInVfcp_019eb6a1-1afb-7975-8326-4187359101a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionPendingCorrectionInVfcp"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionLineItems_019eb6a1-1afb-79a4-ba49-50b8355f6df7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionPendingCorrectionInVfcp_019eb6a1-1afb-7975-8326-4187359101a5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrected_019eb6a1-1afb-71a6-91c2-09a126d98029" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrected"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionLineItems_019eb6a1-1afb-79a4-ba49-50b8355f6df7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrected_019eb6a1-1afb-71a6-91c2-09a126d98029" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.generaldynamics.com/role/ScheduleHLine4iScheduleofAssetsHeldatEndofYearDetails" xlink:type="simple" xlink:href="gd-20260617.xsd#ScheduleHLine4iScheduleofAssetsHeldatEndofYearDetails"/>
  <link:definitionLink xlink:role="http://www.generaldynamics.com/role/ScheduleHLine4iScheduleofAssetsHeldatEndofYearDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019eb6a1-1afb-7334-813a-78dcbdf87414" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable_019eb6a1-1afb-7c92-9572-53fec321778a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019eb6a1-1afb-7334-813a-78dcbdf87414" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable_019eb6a1-1afb-7c92-9572-53fec321778a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019eb6a1-1afb-791b-8f26-83c3f343cb14" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable_019eb6a1-1afb-7c92-9572-53fec321778a" xlink:to="loc_dei_LegalEntityAxis_019eb6a1-1afb-791b-8f26-83c3f343cb14" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-791b-8f26-83c3f343cb14_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-791b-8f26-83c3f343cb14" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-791b-8f26-83c3f343cb14_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019eb6a1-1afb-7bb5-b0cf-4317d5f583ac" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019eb6a1-1afb-791b-8f26-83c3f343cb14" xlink:to="loc_dei_EntityDomain_019eb6a1-1afb-7bb5-b0cf-4317d5f583ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gd_EBP006Member_019eb6a1-1afb-7209-be5c-8d7b4cf1015d" xlink:href="gd-20260617.xsd#gd_EBP006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019eb6a1-1afb-7bb5-b0cf-4317d5f583ac" xlink:to="loc_gd_EBP006Member_019eb6a1-1afb-7209-be5c-8d7b4cf1015d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019eb6a1-1afb-772d-9fc1-cc7101ea3118" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable_019eb6a1-1afb-7c92-9572-53fec321778a" xlink:to="loc_srt_RangeAxis_019eb6a1-1afb-772d-9fc1-cc7101ea3118" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019eb6a1-1afb-772d-9fc1-cc7101ea3118_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019eb6a1-1afb-772d-9fc1-cc7101ea3118" xlink:to="loc_srt_RangeMember_019eb6a1-1afb-772d-9fc1-cc7101ea3118_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019eb6a1-1afb-79ae-865e-a3b9e7be8e9b" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019eb6a1-1afb-772d-9fc1-cc7101ea3118" xlink:to="loc_srt_RangeMember_019eb6a1-1afb-79ae-865e-a3b9e7be8e9b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019eb6a1-1afb-7e16-9d26-96fb0e1a44ec" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019eb6a1-1afb-79ae-865e-a3b9e7be8e9b" xlink:to="loc_srt_MinimumMember_019eb6a1-1afb-7e16-9d26-96fb0e1a44ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019eb6a1-1afb-79dd-95b8-15e155b0a05b" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019eb6a1-1afb-79ae-865e-a3b9e7be8e9b" xlink:to="loc_srt_MaximumMember_019eb6a1-1afb-79dd-95b8-15e155b0a05b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanPlanNumber_019eb6a1-1afb-77d5-9dd3-342ac3b7f6b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanPlanNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019eb6a1-1afb-7334-813a-78dcbdf87414" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanPlanNumber_019eb6a1-1afb-77d5-9dd3-342ac3b7f6b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate_019eb6a1-1afb-783e-b701-7563267d8b4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019eb6a1-1afb-7334-813a-78dcbdf87414" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate_019eb6a1-1afb-783e-b701-7563267d8b4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanAfterDeemedDistribution_019eb6a1-1afb-7b66-98b9-da37a9a76e17" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanAfterDeemedDistribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019eb6a1-1afb-7334-813a-78dcbdf87414" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanAfterDeemedDistribution_019eb6a1-1afb-7b66-98b9-da37a9a76e17" xlink:type="arc" order="2"/>
  </link:definitionLink>
</link:linkbase>
