circle

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).

“The set of all points (x, y) such that (x − 1)2 + y2 = r2 is a circle of radius r around the point (1, 0).”

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 shape, curve or arrangement of objects that approximates to or resembles the geometric figures.

“Children, please join hands and form a circle.”

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

“circle of friends”

The orbit of an astronomical body.

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.

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.

A traffic circle or roundabout.

Compass; circuit; enclosure.

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.

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.

“The ten Circles of the Holy Roman Empire were those principalities or provinces which had seats in the German Diet.”

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

“After working all night, she had circles under her eyes.”

To travel around along a curved path.

“The wolves circled the herd of deer.”

To surround.

“A high fence circles the enclosure.”

To place or mark a circle around.

“Circle the jobs that you are interested in applying for.”

To travel in circles.

“Vultures circled overhead.”