Indefeasible \In`de*fea`si*ble\, a. [Pref. in- not + defeasible:
   cf. OF. indefaisable.]
   Not to be defeated; not defeasible; incapable of being
   annulled or made void; as, an indefeasible or title.
   
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         That the king had a divine and an indefeasible right to
         the regal power.                         --Macaulay.
   
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