circle

1
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).
Similar
coil ring loop
2
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.
Similar
disc disk round
3
Any shape, curve or arrangement of objects that approximates to or resembles the geometric figures.
Children, please join hands and form a circle.

1
A census-designated place in Yukon-Koyukuk Census Area, Alaska, United States. Erroneously thought to be on the Arctic Circle, which is 50 miles further north.
2
A town, the county seat of McCone County, Montana, United States. Named after a cattle brand in the form of a circle.
3
A surname from German.

Definitions