DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   pro
       adv 1: in favor of a proposition, opinion, etc. [ant: con]
       adj 1: in favor of (an action or proposal etc.); "a pro vote"
              [ant: anti]
       n 1: an athlete who plays for pay [syn: professional, pro]
            [ant: amateur]
       2: an argument in favor of a proposal [ant: con]