Definitions from Wiktionary ( )

▸ noun:  (mnemonic) An acronym for the algorithm for multiplying two binomials.
▸ verb:  (transitive) To apply the FOIL algorithm to.
▸ noun:  A very thin sheet of metal.
▸ noun:  (chiefly uncountable) Thin aluminium/aluminum (or, formerly, tin) used for wrapping food.
▸ noun:  A thin layer of metal put between a jewel and its setting to make it seem more brilliant.
▸ noun:  (authorship, figuratively) In literature, theatre/theater, etc., a character who helps emphasize the traits of the main character and who usually acts as an opponent or antagonist, but can also serve as the sidekick of the protagonist.
▸ noun:  (figuratively) Anything that acts by contrast to emphasise the characteristics of something.
▸ noun:  (fencing) A very thin sword with a blunted (or foiled) tip
▸ noun:  A thin, transparent plastic material on which marks are made and projected for the purposes of presentation. See transparency.
▸ noun:  A premium trading card with a glossy finish.
▸ noun:  (heraldry) A stylized flower or leaf.
▸ verb:  (transitive) To cover or wrap with foil.
▸ verb:  To prevent (something) from being accomplished.
▸ verb:  To prevent (someone) from accomplishing something.
▸ verb:  To blunt; to dull; to spoil.
▸ verb:  (obsolete) To tread underfoot; to trample.
▸ noun:  Failure when on the point of attainment; defeat; frustration; miscarriage.
▸ noun:  One of the incorrect answers presented in a multiple-choice test.
▸ noun:  (hunting) The track of an animal.
▸ verb:  (mathematics) To expand a product of two or more algebraic expressions, typically binomials.
▸ verb:  (obsolete) To defile; to soil.
▸ noun:  (architecture) A small arc in the tracery of a window, etc.
▸ noun:  (hydrodynamics, nautical) Clipping of hydrofoil. [(nautical) A wing attached to the hull of a ship that raises it out of the water when travelling at speed and thus reduces drag.]
▸ noun:  (aerodynamics, aviation) Clipping of aerofoil/airfoil.
▸ verb:  (nautical) Clipping of hydrofoil. [(nautical, intransitive) To operate or use or ride atop a hydrofoil wing on a hull so equipped.]

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