Main entry: foil
Definition: a light slender flexible sword tipped by a button
Main entry: foil
Definition: a piece of thin and flexible sheet metal
Usage: the photographic film was wrapped in foil
Main entry: foil, transparency
Definition: picture consisting of a positive photograph or drawing on a transparent base; viewed with a projector
Definition: a device consisting of a flat or curved piece (as a metal plate) so that its surface reacts to the water it is passing through
Usage: the fins of a fish act as hydrofoils
Definition: anything that serves by contrast to call attention to another thing's good qualities
Usage: pretty girls like plain friends as foils
Main entry: foil
Definition: cover or back with foil
Usage: foil mirrors
Main entry: spoil, scotch, queer, thwart, bilk, baffle, foil, frustrate, cross
Definition: hinder or prevent (the efforts, plans, or desires) of
Usage: What ultimately frustrated every challenger was Ruth's amazing September surge; foil your opponent
Main entry: foil
Definition: enhance by contrast
Usage: In this picture, the figures are foiled against the background