The act by which something is foiled; prevention of success. / (hunting) The track of game, such as deer, in the grass. / (architecture) A foil.

present participle of foil

present participle of FOIL

plural of foiling

simple past tense and past 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.