Available Definitions:
1) a. - In the form of, or bounded by, a circle; round.
2) a. - repeating itself; ending in itself; reverting to the point of beginning; hence, illogical; inconclusive; as, circular reasoning.
3) a. - Adhering to a fixed circle of legends; cyclic; hence, mean; inferior. See Cyclic poets, under Cyclic.
4) a. - Addressed to a circle, or to a number of persons having a common interest; circulated, or intended for circulation; as, a circular letter.
5) a. - Perfect; complete.
6) a. - A circular letter, or paper, usually printed, copies of which are addressed or given to various persons; as, a business circular.
7) a. - A sleeveless cloak, cut in circular form.