DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   prevent
       v 1: keep from happening or arising; make impossible; "My sense
            of tact forbids an honest answer"; "Your role in the
            projects precludes your involvement in the competitive
            project" [syn: prevent, forestall, foreclose,
            preclude, forbid]
       2: stop (someone or something) from doing something or being in
          a certain state; "We must prevent the cancer from spreading";
          "His snoring kept me from falling asleep"; "Keep the child
          from eating the marbles" [syn: prevent, keep] [ant:
          allow, let, permit]