What is foil definition?

Foil refers to a thin sheet of metal, typically made of aluminum, that is used for wrapping food, covering containers, and other various purposes. This versatile material is also used in packaging, insulation, electrical conductivity, and even in art and decoration. Foil is characterized by its high pliability, durability, and resistance to moisture, air, and light. It is commonly found in rolls or sheets, and can be easily cut and shaped to fit different applications. Foil is also known for its reflective surface, which makes it useful in reflecting heat and light. Additionally, foil can be coated with different materials to achieve specific properties, such as increased strength or heat resistance.