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"

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."