noun

1. A deep-fried piece of dough or batter, commonly of a toroidal (a ring doughnut) shape, often mixed with various sweeteners and flavourings; or flattened sphere (a filled doughnut) shape filled with jam, custard or cream.

2. Anything in the shape of a torus.

3. A peel-out or skid mark in the shape of a circle; a 360-degree skid.

Synonyms: ring, torus