A planar region bounded by a circle, A circle of communicating arterioles on the sclerotic surrounding the optic nerve, The line that bounds such a figure; a circumference; a ring, transitive verb_ To move around; to revolve around, To encompass, as by a circle; to surround; to inclose; to encircle, intransitive verb_ To move circularly; to form a circle; to circulate, To move in a circle around