Webster's Revised Unabridged Dictionary · 1913

Circumference

Circumference , noun

[Latin circumferentia.]

1.
The line that goes round or encompasses a circular figure; a periphery. — Millon
2.
A circle; anything circular.
His ponderous shield... Behind him cast. The broad circumference Hung on his shoulders like the moon. — Milton
3.
The external surface of a sphere, or of any orbicular body.

Circumference , transitive verb

To include in a circular space; to bound. [Obsolete] — Sir T. Browne