A thin sheet of metal, such as aluminum, used for wrapping or covering food. She wrapped the leftovers in foil to keep them fresh.
A character in literature who contrasts with another character, usually the protagonist, to highlight particular qualities of the other character. In the play, the witty servant acts as a foil to the serious master.
A fencing sword with a light, flexible blade and a blunt point. He practiced his fencing skills with a foil every afternoon.
A thin, flexible leaf or sheet of material, often used in crafts or decoration. The artist used gold foil to add a shimmering effect to the painting.