Foil(n.)
- A leaf or very thin sheet of metal; as, brass foil; tin foil; gold foil.
Foil(n.)
- A thin leaf of sheet copper silvered and burnished, and afterwards coated with transparent colors mixed with isinglass; -- employed by jewelers to give color or brilliancy to pastes and inferior stones.
Foil(n.)
- Anything that serves by contrast of color or quality to adorn or set off another thing to advantage.
Foil(n.)
- A thin coat of tin, with quicksilver, laid on the back of a looking-glass, to cause reflection.
Foil(n.)
- The space between the cusps in Gothic architecture; a rounded or leaflike ornament, in windows, niches, etc. A group of foils is called trefoil, quatrefoil, quinquefoil, etc., according to the number of arcs of which it is composed.