1. (

• frustration ,
• thwarting ,
• foiling

) an act of hindering someone's plans or efforts ;

1. (

• foil

) enhance by contrast; "In this picture, the figures are foiled against the background" ;

2. (

• thwart ,
• queer ,
• spoil ,
• scotch ,
• foil ,
• cross ,
• frustrate ,
• baffle ,
• bilk ,

) hinder or prevent (the efforts, plans, or desires) of; "What ultimately frustrated every challenger was Ruth's amazing September surge"; "foil your opponent" ;

3. (

• foil

) cover or back with foil; "foil mirrors" ;