foil

n. light sword, light fencing sword with a dull edged and a button on its point; thin metal sheets (i.e. aluminum foil); person or thing which serves as a contrast to another; small arc in a window (Architecture)

v. frustrate, balk; prevent someone from succeeding; act as a contrast for; cover or coat with a thin sheet of metal

Foil may refer to:Metal leaf, a thin sheet of metalAluminium foil, a type of wrapping for foodPlastic foil, a thin layer of plasticsFoil (fencing), one of the three weapons used in modern fencingFoil (literature), a character who emphasizes the traits of a main characterComedic foil, (or comic foil), is the straight man in a comedy team.Foil (fluid mechanics), a type of wing or blade used to provide liftFoil (papermaking), a type of ving under the wire in the wire section of a paper machine creating a vacuum pulse to eliminate water from the stock (fibre/water slurry).Ultrasonic foil (papermaking), a type of high frequency vibrating foil under the wire, creating cavitation, imploding vacuum bubbles, in the stock on the wire. The shock waves from the imploding bubbles will distribute the fibres more uniform in the paper web and this will give a stronger paper.Foil bearing, a type of fluid bearingFOIL (acronym for Film Over Incandescent Light), an image projection techniqueFOIL rule {acronym for First Outer Inner Last, or similarly Front Outside Inside Last}, used to make a quadratic trinomial in Algebra
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Noun
1. a piece of thin and flexible sheet metal; "the photographic film was wrapped in foil"
(hypernym) sheet metal
(hyponym) aluminum foil, aluminium foil, tin foil
2. anything that serves by contrast to call attention to another thing's good qualities; "pretty girls like plain friends as foils"
(synonym) enhancer
(hypernym) attention
3. 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"
(synonym) hydrofoil
(hypernym) device
4. picture consisting of a positive photograph or drawing on a transparent base; viewed with a projector
(synonym) transparency
(hypernym) picture, image, icon, ikon
(hyponym) slide, lantern slide
5. a light slender flexible sword tipped by a button
(hypernym) fencing sword
Verb
1. enhance by contrast; "In this picture, the figures are foiled against the background"
(hypernym) contrast, counterpoint
(derivation) enhancer
2. hinder or prevent (the efforts, plans, or desires) of; "What ultimately frustrated every challenger was Ruth's amazing September surge"; "foil your opponent"
(synonym) thwart, queer, spoil, scotch, cross, frustrate, baffle, bilk
(hypernym) prevent, forestall, foreclose, preclude, forbid
(hyponym) disappoint, let down
(derivation) frustration, thwarting, foiling
3. cover or back with foil; "foil mirrors"
(hypernym) cover

n. foil

File Oriented Interpretive Language. CAI language.
["FOIL - A File Oriented Interpretive Language", J.C. Hesselbart, Proc ACM 23rd National Conf (1968)].