Etymology : Middle English, to trample, full cloth, from Middle French fouler; more at FULL
Pronunciation : 'foi(&)l
Function : transitive verb
Date : 14th century
1. light sword; thin metal sheets (i.e. aluminum foil); person or thing which serves as a contrast to another; small arc in a window (Architecture). frustrate, balk; prevent someone from succeeding; act as a contrast for; cover or coat with a thin sheet of metal. foil\foil\, v. t. [see:
6th file.] to defile; to soil. [obs.]foil \foil\, n.
2. failure of success when on the point of attainment; defeat; frustration; miscarriage. nor e'er was fate so near a foil.
3. a blunt weapon used in fencing, resembling a smallsword in the main, but usually lighter and having a button at the point. blunt as the fencer's foils, which hit, but hurt not. isocrates contended with a foil against demosthenes with a word.
4. the track or trail of an animal.
5. To tread under foot; to trample.
6. To render vain or nugatory; to baffle; to outwit; to balk; to frustrate; to defeat.
7. To blunt; to dull; to spoil; as, to foil the scent in chase.
8. To defile; to soil.
9. Failure of success when on the point of attainment; defeat; frustration; miscarriage.
10. A blunt weapon used in fencing, resembling a smallsword in the main, but usually lighter and having a button at the point.
11. The track or trail of an animal.
12. A leaf or very thin sheet of metal; as, brass foil; tin foil; gold foil.
13. A thin leaf of sheet copper silvered and burnished, and afterwards coated with transparent colors mixed with isinglass; employed by jewelers to give color or brilliancy to pastes and inferior stones.
14. Anything that serves by contrast of color or quality to adorn or set off another thing to advantage.
15. A thin coat of tin, with quicksilver, laid on the back of a looking-glass, to cause reflection.
16. The space between the cusps in Gothic architecture; a rounded or leaflike ornament, in windows, niches, etc.
17. A group of foils is called trefoil, quatrefoil, quinquefoil, etc., according to the number of arcs of which it is composed. a light slender flexible sword tipped by a button a piece of thin and flexible sheet metal; "the photographic film was wrapped in foil" picture consisting of a positive photograph or drawing on a transparent base; viewed with a projector anything that serves by contrast to call attention to another thing's good qualities; "pretty girls like plain friends as foils" cover or back with foil; "foil mirrors" enhance by contrast; "In this picture, the figures are foiled against the background".
18. 1. Foil consists of sheets of metal as thin as paper. It is used to wrap food in. Pour cider around the meat and cover with foil. aluminium foil.
19. If you foil someone's plan or attempt to do something, for example to commit a crime, you succeed in stopping them from doing what they want. A brave police chief foiled an armed robbery on a jewellers' by grabbing the raiders' shotgun = thwart.
20. approval If you refer to one thing or person as a foil for another, you approve of the fact that they contrast with each other and go well together, often in a way that makes the second thing or person seem better or less harmful. He thought of her serenity as a foil for his intemperance A cold beer is the perfect foil for a curry. = complement. to prevent something bad that someone is planning to do.