DuckCorp Dico

Found one definition

1.                 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]