Definition of: circle

(sûr′kəl) noun
1. A plane figure bounded by a curved line everywhere equally distant from the center; also, the circumference of such a figure.
2. A circular object or arrangement of objects, or whatever is included within it; an enclosure; ring; halo: a circle around the moon.
3. Loosely, a round or spherical body.
4. An association of persons having the same interests or pursuits; a set; class; coterie.
5. A series ending at the starting point; a repeated succession; hence, a completed series or system: the circle of the months.
6. A circular path or course; circuit.
7. An indirect statement; circumlocution.
8. Logic A form of argument in which the conclusion is virtually assumed to prove the premise and vice versa: also called argument in a circle.
9. In some European countries, an administrative governmental district.
10. An astronomical or other instrument whose important parts are graduated circles.
11. A circus ring.
12. A tier of seats or gallery in a theater: the dress circle.
13. A crown; diadem.
14. Astron. The orbit of a heavenly body; formerly, the supposed sphere of a planet or other body.
15. The domain of a special influence.
—v. ·cled, ·cling v.t.
1. To enclose with or as with a circle; encompass; surround.
2. To move around, as in a circle: The dog circles the field.
—v.i.
3. To move in a circle; revolve. [<L circulus, dim. of circus ring]
—cir′cler noun