Definition of Foil

1. Noun. A piece of thin and flexible sheet metal. "The photographic film was wrapped in foil"

Specialized synonyms: Aluminium Foil, Aluminum Foil, Tin Foil, Chaff, Gold Foil, Tin Foil, Tinfoil
Generic synonyms: Sheet Metal
Derivative terms: Foliate, Foliate

2. Verb. Enhance by contrast. "In this picture, the figures are foiled against the background"
Generic synonyms: Contrast, Counterpoint

3. Noun. Anything that serves by contrast to call attention to another thing's good qualities. "Pretty girls like plain friends as foils"
Exact synonyms: Enhancer
Generic synonyms: Attention
Derivative terms: Enhance

4. Verb. Hinder or prevent (the efforts, plans, or desires) of. "Sam cannot foil Sue "; "Foil your opponent"

5. Noun. 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"
Exact synonyms: Hydrofoil
Generic synonyms: Device

6. Verb. Cover or back with foil. "Foil mirrors"
Generic synonyms: Cover

7. Noun. Picture consisting of a positive photograph or drawing on a transparent base; viewed with a projector.
Exact synonyms: Transparency
Generic synonyms: Icon, Ikon, Image, Picture
Specialized synonyms: Lantern Slide, Slide, Overhead, Viewgraph

8. Noun. A light slender flexible sword tipped by a button.
Category relationships: Fencing
Generic synonyms: Fencing Sword

Definition of Foil

1. v. t. To tread under foot; to trample.

2. v. t. To defile; to soil.

3. n. Failure of success when on the point of attainment; defeat; frustration; miscarriage.

4. n. A leaf or very thin sheet of metal; as, brass foil; tin foil; gold foil.

Definition of Foil

1. Proper noun. A particular algorithm for multiplying two binomials. ¹

2. Verb. (transitive) To apply the FOIL algorithm to. ¹

3. Noun. A very thin sheet of metal. ¹

4. Noun. Thin aluminium/aluminum (or, formerly, tin) used for wrapping food. ¹

5. Noun. A thin layer of metal put between a jewel and its setting to make it seem more brilliant. ¹

6. Noun. (figuratively) In literature, theatre/theater, etc, a character who helps emphasize the traits of the main character. ¹

7. Noun. (figuratively) Anything that acts to emphasise the characteristics of something. ¹

8. Noun. (fencing) A very thin sword with a blunted (or foiled) tip ¹

9. Noun. A thin, transparent plastic material on which marks are made and projected for the purposes of presentation. See transparency. ¹

10. Noun. (heraldiccharge) A stylized flower or leaf. ¹

11. Noun. Shortened form of hydrofoil. ¹

12. Noun. Shortened form of aerofoil/airfoil. ¹

13. Verb. To prevent (something) from being accomplished. ¹

14. Verb. To prevent (someone) from accomplishing something. ¹

15. Noun. (hunting) The track of an animal. ¹

16. Verb. (mathematics) To multiply two binomials together. ¹

¹ Source:

Definition of Foil

1. to prevent the success of [v -ED, -ING, -S] : FOILABLE [adj]

Medical Definition of Foil

1. 1. A leaf or very thin sheet of metal; as, brass foil; tin foil; gold foil. 2. A thin leaf of sheet copper silvered and burnished, and afterwards coated with transparent colours mixed with isinglass; employed by jewelers to give colour or brilliancy to pastes and inferior stones. 3. Anything that serves by contrast of colour or quality to adorn or set off another thing to advantage. "As she a black silk cap on him began To set, for foil of his milk-white to serve." (Sir P. Sidney) "Hector has a foil to set him off." (Broome) 4. A thin coat of tin, with quicksilver, laid on the back of a looking-glass, to cause reflection. 5. The space between the cusps in Gothic architecture; a rounded or leaflike ornament, in windows, niches, etc. A group of foils is called trefoil, quatrefoil, quinquefoil, etc, according to the number of arcs of which it is composed. Foil stone, an imitation of a jewel or precious stone. Origin: OE. Foil leaf, OF. Foil, fuil, fueil, foille, fueille, F. Feuille, fr. L. Folium, pl. Folia; akin to Gr, and perh. To E. Blade. Cf. Foliage, Folio. Source: Websters Dictionary (01 Mar 1998)

Foil Pictures

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Lexicographical Neighbors of Foil

foie gras
foil (current term)

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