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n. A plane figure, bounded by a single curve line called its circumference, every part of which is equally distant from a point within it, called the center. The line that bounds such a figure; a circumference; a ring.
- (Astron.) An instrument of observation, the graduated limb of which consists of an entire circle. When it is fixed to a wall in an observatory, it is called a mural circle; when mounted with a telescope on an axis and in Y's, in the plane of the meridian, a meridian or transit circle; when involving the principle of reflection, like the sextant, a reflecting circle; and when that of repeating an angle several times continuously along the graduated limb, a repeating circle.
- A round body; a sphere; an orb. Compass; circuit; enclosure. A company assembled, or conceived to assemble, about a central point of interest, or bound by a common tie; a class or division of society; a coterie; a set. A circular group of persons; a ring. A series ending where it begins, and repeating itself.
- (Logic) A form of argument in which two or more unproved statements are ...
