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1. Of or relating to a circle.
a. Shaped like or nearly like a circle; round.
b. Moving in or forming a circle.
3. Circuitous; roundabout: took a circular route to the office.
4. Using a premise to prove a conclusion that in turn is used to prove the premise: a circular argument.
5. Defining one word in terms of another that is itself defined in terms of the first word.
6. Addressed or distributed to a large number of persons.
A printed advertisement, directive, or notice intended for mass distribution.

[Middle English circuler, from Anglo-Norman, from Latin circulāris, from circulus, circle; see circle.]

cir′cu·lar′i·ty (-lăr′ĭ-tē) n.
cir′cu·lar·ly adv.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adv.1.circularly - in a circular manner
References in classic literature ?
But, Joe was readier with his definition than I had expected, and completely stopped me by arguing circularly, and answering with a fixed look, "Her.
We directed him to draw out whatever was at the end of that chain; which appeared to be a globe, half silver, and half of some transparent metal; for, on the transparent side, we saw certain strange figures circularly drawn, and though we could touch them, till we found our fingers stopped by the lucid substance.
At 600 yards from the well, and circularly arranged around it as a central point, rose 1,200 reverberating ovens, each six feet in diameter, and separated from each other by an interval of three feet.
The bees must have worked at very nearly the same rate on the opposite sides of the ridge of vermilion wax, as they circularly gnawed away and deepened the basins on both sides, in order to have succeeded in thus leaving flat plates between the basins, by stopping work along the intermediate planes or planes of intersection.
Now bees, as may be clearly seen by examining the edge of a growing comb, do make a rough, circumferential wall or rim all round the comb; and they gnaw into this from the opposite sides, always working circularly as they deepen each cell.
They looked tempting; eight in number, circularly set out on a white plate on a tray covered with a white napkin, flanked by a slice of buttered French roll, and a little compact glass of cool wine and water; but she resisted all persuasions, and sent them down again--placing the act to her credit, no doubt, in her Eternal Day-Book.
Conveyor belts may comprise one or multiple layers of materials such as rubber strapped around pulleys that rotate circularly and carry objects or materials along with the rotation.
The claim that Hunt is good is first assumed and later, circularly, confirmed.
com/a/mass-shootings-sandy-hook)--which somewhat circularly cites "The Guardian" as one of its sources--actually reaches 885 by counting (although not seeking details about) incidents in which four or more people were reportedly shot, whether anyone was killed or not.
Each circular fold is circularly arranged and extends about one half to two thirds of the way around the circumference of the lumen.
This complex scenario led one to predict that the light emitted during the explosion of the star must have been circularly polarized as if it were a screw.
We want to understand why some exoplanets have extremely eccentric orbits, while in other cases, such as the solar system, planets orbit mostly circularly," Van Eylen says.