2[uncountableU]DF paper that is covered with very thin sheets of metal 箔纸
chocolates in foil wrappers
箔纸包的巧克力
3be a foil to/for somebody/somethingDIFFERENTto emphasize the good qualities of another person or thing, by being very different from them 衬托出某人/某物,作为某人/某物的陪衬
The simple stone floor is the perfect foil for the brightly coloured furnishings.