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English definition of “foil”

foil

noun [U] (METAL SHEET)    /fɔɪl/
a very thin sheet of metal, especially used to wrap food in to keep it fresh: tin/silver foilUK aluminium (US aluminum) foilPreserving and storing food
(Definition of foil noun (METAL SHEET) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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