DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   swop
       n 1: an equal exchange; "we had no money so we had to live by
            barter" [syn: barter, swap, swop, trade]
       v 1: exchange or give (something) in exchange for [syn: trade,
            swap, swop, switch]