Look up foil in Wiktionary, the free dictionary. 1 day ago · frustrate, thwart, foil, baffle, balk mean to check or defeat another's plan or block achievement of a goal. frustrate implies making vain or ineffectual all efforts however vigorous or … FOIL definition: 1. a very thin sheet of metal, especially used to wrap food in to keep it fresh: 2. One that stands in contrast to and emphasizes the distinctive characteristics of another: "I am resolved my husband shall not be a rival, but a foil to me" (Charlotte Brontë). Use Reynolds aluminum foil to line baking pans & sheets for easy clean-up, or to wrap food while roasting or baking to seal in flavor and moisture. Definition of foil noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. May 7, 2026 · foil (third-person singular simple present foils, present participle foiling, simple past and past participle foiled) To prevent (something) from being accomplished.
