The meaning of FOIL is to prevent from attaining an end : defeat. How to use foil in a sentence. Synonym Discussion of Foil.

FOIL definition: 1. a very thin sheet of metal, especially used to wrap food in to keep it fresh: 2. a piece of a…. Learn more.

FOIL definition: to prevent the success of; frustrate; balk. See examples of foil used in a sentence.

Look up foil in Wiktionary, the free dictionary.

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).

Dec 24, 2025 · foil (countable and uncountable, plural foils) A very thin sheet of metal or plastic. (chiefly uncountable) Thin aluminium / aluminum (or, formerly, tin) used for wrapping food. A …

If you refer to one thing or person as a foil for another, you approve of the fact that they contrast with each other and go well together, often in a way that makes the second thing or person …

Definition of foil noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

6 days ago · A food safety expert and Reynolds settle the debate: Does is matter which side you use when cooking with aluminum foil? The answer is simple.

Aluminium foil (or aluminum foil in American English; also called tinfoil) is aluminium prepared in thin metal leaves. The foil is pliable and can be readily bent or wrapped around objects.