circle

(geometry) A two-dimensional geometric figure, a line, consisting of the set of all those points in a plane that are equally distant from a given point (center).

A two-dimensional geometric figure, a disk, consisting of the set of all those points of a plane at a distance less than or equal to a fixed distance (radius) from a given point.

Any thin three-dimensional equivalent of the geometric figures.

A curve that more or less forms part or all of a circle.

A specific group of persons; especially one who shares a common interest.

The orbit of an astronomical body.

(cricket) A line comprising two semicircles of 30 yards radius centred on the wickets joined by straight lines parallel to the pitch used to enforce field restrictions in a one-day match.

(Wicca) A ritual circle that is cast three times deosil and closes three times widdershins either in the air with a wand or literally with stones or other items used for worship.

(South Africa, Philippines, India) A traffic circle or roundabout.

(obsolete) Compass; circuit; enclosure.

(astronomy) An instrument of observation, whose graduated limb consists of an entire circle. When fixed to a wall in an observatory, it is called a mural circle; when mounted with a telescope on an axis and in Y's, in the plane of the meridian, a meridian or transit circle; when involving the principle of reflection, like the sextant, a reflecting circle; and when that of repeating an angle several times continuously along the graduated limb, a repeating circle.

A series ending where it begins, and repeating itself.

(logic) A form of argument in which two or more unproved statements are used to prove each other; inconclusive reasoning.

Indirect form of words; circumlocution.

A territorial division or district.

(in the plural) A bagginess of the skin below the eyes from lack of sleep.