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.
Orbit.
A specific group of persons; especially one who shares a common interest.
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.
A bagginess of the skin below the eyes from lack of sleep.
To travel around along a curved path.
To surround.
To place or mark a circle around.
To travel in circles.
A regular three-dimensional object in which every cross-section is a circle; the figure described by the revolution of a circle about its diameter from 14th c..
A spherical physical object; a globe or ball. from 14th c.
The apparent outer limit of space; the edge of the heavens, imagined as a hollow globe within which celestial bodies appear to be embedded. from 14th c.
Any of the concentric hollow transparent globes formerly believed to rotate around the heavenly bodies; there were originally believed to be eight, and later nine and ten; friction between them was thought to cause a harmonious sound (the music of the spheres). from 14th c.
An area of activity for a planet; or by extension, an area of influence for a god, hero etc. from 14th c.
The region in which something or someone is active; one's province, domain. from 17th c.
The set of all points in three-dimensional Euclidean space (or n-dimensional space, in topology) that are a fixed distance from a fixed point from 20th c..
The extension of a general conception, or the totality of the individuals or species to which it may be applied.
To place in a sphere, or among the spheres; to ensphere.
To make round or spherical; to perfect.
