(1):
(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.
(2):
(n.) A thin coat of tin, with quicksilver, laid on the back of a looking-glass, to cause reflection.
(3):
(n.) Failure of success when on the point of attainment; defeat; frustration; miscarriage.
(4):
(v. t.) To render (an effort or attempt) vain or nugatory; to baffle; to outwit; to balk; to frustrate; to defeat.
(5):
(v. t.) To tread under foot; to trample.
(6):
(n.) Anything that serves by contrast of color or quality to adorn or set off another thing to advantage.
(7):
(n.) The track or trail of an animal.
(8):
(n.) A blunt weapon used in fencing, resembling a smallsword in the main, but usually lighter and having a button at the point.
(9):
(v. t.) To defile; to soil.
(10):
(v. t.) To blunt; to dull; to spoil; as, to foil the scent in chase.
(11):
(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.
(12):
(n.) A leaf or very thin sheet of metal; as, brass foil; tin foil; gold foil.