In the form of, or bounded by, a circle; round.

repeating itself; ending in itself; reverting to the point of beginning; hence, illogical; inconclusive; as, circular reasoning.

Adhering to a fixed circle of legends; cyclic; hence, mean; inferior. See Cyclic poets, under Cyclic.

Addressed to a circle, or to a number of persons having a common interest; circulated, or intended for circulation; as, a circular letter.

Shaped like a circle.

shaped like a ring

marked by or moving in a circle

In the shape of a circle, round.

having the shape of a circle; a circular cylinder is one in which its defining shape is a circle, and most often is used to mean a right circular cylinder; a circular cone is one in which its defining shape is a circle, and most often is used to mean a right circular cone;