simple past tense and past participle of foil

(architecture) Having a foil.

simple past tense and past participle of FOIL

present participle of FOIL

Third-person singular simple present indicative form of FOIL

(transitive) To apply the FOIL algorithm to.

(mathematics) To expand a product of two or more algebraic expressions, typically binomials.

To prevent (something) from being accomplished. / To prevent (someone) from accomplishing something. / To blunt; to dull; to spoil. / (obsolete) To tread underfoot; to trample.

(obsolete) To defile; to soil.

A very thin sheet of metal. / (uncountable) Thin aluminium/aluminum (or, formerly, tin) used for wrapping food. / A thin layer of metal put between a jewel and its setting to make it seem more brilliant.