Defeasible

from WordNet (r) 3.0 (2006)

defeasible
    adj 1: capable of being annulled or voided or terminated; "a
           claim to an estate may be defeasible so long as the
           claimant is under 21 and unmarried" [ant: {indefeasible}]

from The Collaborative International Dictionary of English v.0.48

Defeasible \De*fea"si*ble\, a. [See {Defeasance}.]
   Capable of being annulled or made void; as, a defeasible
   title. -- {De*fea"si*ble*ness}, n.
   [1913 Webster]

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