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foil Definition
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foil
noun(foil)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
Synonyms: hydrofoil,
Examples:
The fins of a fish act as hydrofoils.
foil
noun(foil)anything that serves by contrast to call attention to another thing's good qualities
Synonyms: enhancer,
Examples:
Pretty girls like plain friends as foils.
foil
verb(foil)hinder or prevent (the efforts, plans, or desires) of
Examples:
Foil your opponent.
foil
noun(foil)picture consisting of a positive photograph or drawing on a transparent base; viewed with a projector
Synonyms: transparency,
foil
noun(foil)a light slender flexible sword tipped by a button
foil
noun(foil)a piece of thin and flexible sheet metal
Examples:
The photographic film was wrapped in foil.
foil
verb(foil)cover or back with foil
Examples:
Foil mirrors.
foil
verb(foil)enhance by contrast
Examples:
In this picture, the figures are foiled against the background.