<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by CompSci Transform (tm) - http://www.compsciresources.com -->
<!-- Created: Sat Nov 15 00:29:12 UTC 2025 -->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:xbrldt="http://xbrl.org/2005/xbrldt">
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/spac/2025/spac-2025.xsd#DilutionSourcesOnly" roleURI="http://xbrl.sec.gov/spac/role/DilutionSourcesOnly"/>
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/spac/2025/spac-2025.xsd#SecurityClassesOnly" roleURI="http://xbrl.sec.gov/spac/role/SecurityClassesOnly"/>
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/spac/2025/spac-2025.xsd#SponsorsAffiliatesOrPromotersOnly" roleURI="http://xbrl.sec.gov/spac/role/SponsorsAffiliateOrPromotersOnly"/>
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/spac/2025/spac-2025.xsd#ConflictOfInterestPartiesOnly" roleURI="http://xbrl.sec.gov/spac/role/ConflictOfInterestPartiesOnly"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" arcroleURI="http://xbrl.org/int/dim/arcrole/all"/>
  <definitionLink xlink:role="http://xbrl.sec.gov/spac/role/DilutionSourcesOnly" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="spac_AllDilutionSourcesMember" xlink:href="https://xbrl.sec.gov/spac/2025/spac-2025.xsd#spac_AllDilutionSourcesMember"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_NoOverAllotmentMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_NoOverAllotmentMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllDilutionSourcesMember" xlink:to="ck0002093912_NoOverAllotmentMember" order="20" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_FullOverAllotmentMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_FullOverAllotmentMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllDilutionSourcesMember" xlink:to="ck0002093912_FullOverAllotmentMember" order="21" xbrldt:closed="true"/>
  </definitionLink>
  <definitionLink xlink:role="http://xbrl.sec.gov/spac/role/SecurityClassesOnly" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="spac_AllSecurityClassesMember" xlink:href="https://xbrl.sec.gov/spac/2025/spac-2025.xsd#spac_AllSecurityClassesMember"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_ClassBOrdinarySharesMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_ClassBOrdinarySharesMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="ck0002093912_ClassBOrdinarySharesMember" order="17" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_PrivateWarrantsMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_PrivateWarrantsMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="ck0002093912_PrivateWarrantsMember" order="18" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_IncreaseAttributableToPublicShareholdersMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_IncreaseAttributableToPublicShareholdersMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="ck0002093912_IncreaseAttributableToPublicShareholdersMember" order="19" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_ProFormaNetTangibleBookValueAfterThisOfferingMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_ProFormaNetTangibleBookValueAfterThisOfferingMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="ck0002093912_ProFormaNetTangibleBookValueAfterThisOfferingMember" order="20" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_NetProceedsFromThisOfferingAndTheSaleOfPrivateWarrantsMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_NetProceedsFromThisOfferingAndTheSaleOfPrivateWarrantsMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="ck0002093912_NetProceedsFromThisOfferingAndTheSaleOfPrivateWarrantsMember" order="21" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_OfferingCostsAccruedForOrPaidInAdvanceExcludedFromTangibleBookValueMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_OfferingCostsAccruedForOrPaidInAdvanceExcludedFromTangibleBookValueMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="ck0002093912_OfferingCostsAccruedForOrPaidInAdvanceExcludedFromTangibleBookValueMember" order="22" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_OverAllotmentLiabilityMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_OverAllotmentLiabilityMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="ck0002093912_OverAllotmentLiabilityMember" order="23" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_DeferredUnderwritingFeesMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_DeferredUnderwritingFeesMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="ck0002093912_DeferredUnderwritingFeesMember" order="24" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_RedemptionsMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_RedemptionsMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="ck0002093912_RedemptionsMember" order="25" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_OrdinarySharesOutstandingPriorToThisOfferingMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_OrdinarySharesOutstandingPriorToThisOfferingMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="ck0002093912_OrdinarySharesOutstandingPriorToThisOfferingMember" order="26" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_OrdinarySharesForfeitedIfOverAllotmentIsNotExercisedMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_OrdinarySharesForfeitedIfOverAllotmentIsNotExercisedMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="ck0002093912_OrdinarySharesForfeitedIfOverAllotmentIsNotExercisedMember" order="27" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_OrdinarySharesOfferedMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_OrdinarySharesOfferedMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="ck0002093912_OrdinarySharesOfferedMember" order="28" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_OrdinarySharesRedeemedMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_OrdinarySharesRedeemedMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="ck0002093912_OrdinarySharesRedeemedMember" order="29" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_RepresentativeSharesMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_RepresentativeSharesMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="ck0002093912_RepresentativeSharesMember" order="30" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_PrivatePlacementUnitsMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_PrivatePlacementUnitsMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="ck0002093912_PrivatePlacementUnitsMember" order="31" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_OverAllotmentOptionsMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_OverAllotmentOptionsMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="ck0002093912_OverAllotmentOptionsMember" order="32" xbrldt:closed="true"/>
  </definitionLink>
  <definitionLink xlink:role="http://xbrl.sec.gov/spac/role/SponsorsAffiliateOrPromotersOnly" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="spac_AllSpacSponsorsAffiliatesOrPromotersMember" xlink:href="https://xbrl.sec.gov/spac/2025/spac-2025.xsd#spac_AllSpacSponsorsAffiliatesOrPromotersMember"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_SponsorMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_SponsorMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSpacSponsorsAffiliatesOrPromotersMember" xlink:to="ck0002093912_SponsorMember" order="13" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_PraetorianAcquisitionCorpMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_PraetorianAcquisitionCorpMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSpacSponsorsAffiliatesOrPromotersMember" xlink:to="ck0002093912_PraetorianAcquisitionCorpMember" order="14" xbrldt:closed="true"/>
  </definitionLink>
  <definitionLink xlink:role="http://xbrl.sec.gov/spac/role/ConflictOfInterestPartiesOnly" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="spac_AllConflictOfInterestPartiesMember" xlink:href="https://xbrl.sec.gov/spac/2025/spac-2025.xsd#spac_AllConflictOfInterestPartiesMember"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_OurInitialShareholdersMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_OurInitialShareholdersMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllConflictOfInterestPartiesMember" xlink:to="ck0002093912_OurInitialShareholdersMember" order="15" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0002093912_OurSponsorAndMembersOfManagementMember" xlink:href="ck0002093912-20251114.xsd#ck0002093912_OurSponsorAndMembersOfManagementMember"/>
<!-- [WMV6][QR9rui87xLepJUQadyJpNMI6NodZzDeYwQRad4CSoS9zxIbEJ6K1qTDTbMbSv5ytJf50HG9Mt3tBvxMlfx+hVd6sfUa30AqX221uF+kGSt0whxDFE9qJjSyNBtCpCc1vx4wNfxX8UNZfZB4sKAe9vzFvVeeHFm5to/B5n2GcnHcEeA70oNYxyTEFKqstt5ur2bbe0rbcMRWi3vTAk5e4015VUHwF1uFZFg9+ejMgiZuwULk2nelEdnHkf7ioyLITvxmrD7cFoet531hCKnZOjXcpkIz8OZX4QzZ7XJyg56fr2B3RYUA8c+T36P5x1Zunde4xZKCGypaba2voIJE3dgLOmcafSQgcbb2PWJKKLJZmMuubNJ9DRii8ZpfzjQ==] CSR-->
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllConflictOfInterestPartiesMember" xlink:to="ck0002093912_OurSponsorAndMembersOfManagementMember" order="16" xbrldt:closed="true"/>
  </definitionLink>
</linkbase>
