DuckCorp Dico

Found one definition

1.                 From English - Polish Piotrowski+Saloni/FreeDict dictionary ver. 0.2:
                   
   
   
                   
                     
   foil /fɔɪl/
   I.  <N> 1.  folia
    2.  tło kontrastowe, tło
    3.  [sport]  floret
   II.  <V>  niweczyć, udaremniać