Meaning of foil

Definition of foil

(noun) a piece of thin and flexible sheet metal; "the photographic film was wrapped in foil"
anything that serves by contrast to call attention to another thing's good qualities; "pretty girls like plain friends as foils"
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; "the fins of a fish act as hydrofoils"
picture consisting of a positive photograph or drawing on a transparent base; viewed with a projector
(verb) enhance by contrast; "In this picture, the figures are foiled against the background"
hinder or prevent (the efforts, plans, or desires) of; "What ultimately frustrated every challenger was Ruth's amazing September surge"; "foil your opponent"
cover or back with foil; "foil mirrors"

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