| Foil: English to English |
| Foil (n.) A blunt weapon used in fencing, resembling a smallsword in the main, but usually lighter and having a button at the point. |
| Foil (n.) A leaf or very thin sheet of metal; as, brass foil; tin foil; gold foil. |
| Foil (n.) A thin coat of tin, with quicksilver, laid on the back of a looking-glass, to cause reflection. |
| 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.) Failure of success when on the point of attainment; defeat; frustration; miscarriage. |
| 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. |
| Foil (n.) The track or trail of an animal. |
| Foil (v. t.) To blunt; to dull; to spoil; as, to foil the scent in chase. |
| Foil (v. t.) To defile; to soil. |
| Foil (v. t.) To render (an effort or attempt) vain or nugatory; to baffle; to outwit; to balk; to frustrate; to defeat. |
| Foil (v. t.) To tread under foot; to trample. |