(baseball) The circle drawn or painted on the field where the next batter to hit waits.

(automotive, of a road vehicle) The circular path formed by the wheel furthest from the centre of the turn when turning to the maximum extent.

(meteorology) A luminous halo, each side of the sun parallel to the horizon, caused by refraction of sunlight through ice crystals.

A supposed error in reasoning attributed to René Descartes. A form of circular argument.

A situation in which the solution to one problem makes each future problem easier to solve than the original one.

A group of families who share the task of babysitting on a rotational, or other equalising basis.

Alternative spelling of semicircle

Alternative spelling of circular sector

Synonym of fairy ring / A circular patch barren of vegetation, often encircled by a ring of stimulated grass growth, typically found in regions of arid grassland.

A number of close friends who usually do things together as a group.