1.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

"The fins of a fish act as hydrofoils"

Related Noun(s):hydrofoil

Category: Objects

2.Definition: a light slender flexible sword tipped by a button

Category: Objects

3.Definition: a piece of thin and flexible sheet metal

"The photographic film was wrapped in foil"

Category: Objects

4.Definition: anything that serves by contrast to call attention to another thing's good qualities

"Pretty girls like plain friends as foils"

Related Noun(s):enhancer

Category: General

5.Definition: picture consisting of a positive photograph or drawing on a transparent base; viewed with a projector

Related Noun(s):transparency

Category: Objects