having the form of a circle; round

a circular tower.

of or pertaining to a circle

a circular plane.

moving in or forming a circle or a circuit

the circular rotation of the earth.

moving or occurring in a cycle or round

the circular succession of the seasons.

roundabout; indirect; circuitous

a circular route.

Logic . of or pertaining to reasoning in which the conclusion is ostensibly proved, but in actuality it or its equivalent has been assumed as a premise.

pertaining to a circle or set of persons.

(of a letter, memorandum, etc.) addressed to a number of persons or intended for general circulation.

a letter, advertisement, notice, or statement for circulation among the general public.

adjective

annular , circling , disklike , indirect , oblique , orbicular , round , rounded , spheroid , globoid , globular , spheric , spherical , anfractuous , circuitous , devious , roundabout , tortuous

noun

advertisement , booklet , broadside , brochure , flyer , handout , insert , leaflet , literature , notice , pamphlet , poster , publication , throwaway , annular , bill , complete , curved , flier , handbill , perfect , ringed , round , roundabout , rounded , spheroid , spinning