To render (an effort or attempt) vain or nugatory; to baffle; to outwit; to balk; to frustrate; to defeat.
To blunt; to dull; to spoil; as, to foil the scent in chase.
To defile; to soil.
Failure of success when on the point of attainment; defeat; frustration; miscarriage.
A blunt weapon used in fencing, resembling a smallsword in the main, but usually lighter and having a button at the point.
The track or trail of an animal.
A leaf or very thin sheet of metal; as, brass foil; tin foil; gold foil.
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.
Anything that serves by contrast of color or quality to adorn or set off another thing to advantage.
A thin coat of tin, with quicksilver, laid on the back of a looking-glass, to cause reflection.
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.
For those, like me, who can't rely on being given a home smoker this Christmas, you can build your own approximation with just a roll of tin foil and a big wok or pan for which you have a lid. Yotam Ottolenghi
Wrap fish fillets, sliced veggies, and other quick-cooking items inside foil packets with bundles of fresh herbs and throw them directly on the grill; the steam will release the herb's perfume and flavor anything contained inside the pouch. Emeril Lagasse
The simplest fix for better grilling is to line the inside of your barbecue with tin foil. It dramatically affects how evenly the heat is distributed. That crusty black hibachi or Weber grill is doing your food no favors. Nathan Myhrvold
If you really want to diminish a candidate, depict him as the foil of his handler. This is as old in American politics as politics itself. Karl Rove
When you have a Green Lantern mixing with a foil like Batman, you get scenes that are comic-book history. There's the epicness of it all. Jim Lee
foil in French is fleuret, feuille mince
foil in German is Metallfolie, Folie
foil in Italian is foglia laminata
foil in Norwegian is forpurre, forhindre, florett, folie
foil in Spanish is lamina
foil in Swedish is folie, florett