n. A deep-fried piece of dough or batter, commonly of a toroidal (a ring doughnut) often mixed with various sweeteners and flavourings; or flattened sphere (a filled doughnut) shape filled with jam, custard or cream.n. Anything in the shape of a torus.n. A peel-out or skid mark in the shape of a circle; a 360-degree skid.n. A spare car tyre, usually stored in the boot, that is smaller than a full sized tyre and is only intended for temporary use.