CIRCUMFERENCE
circumference, perimeter
(noun) the size of something as given by the distance around it
circumference
(noun) the length of the closed curve of a circle
circumference, circuit
(noun) the boundary line encompassing an area or object; “he had walked the full circumference of his land”; “a danger to all races over the whole circumference of the globe”
Source: WordNet® 3.1
Etymology
Noun
circumference (plural circumferences)
(geometry) The line that bounds a circle or other two-dimensional figure
(geometry) The length of such a line
(obsolete) The surface of a round or spherical object
(graph theory) The length of the longest cycle of a graph
Synonyms
• (geometry): perimeter, umstroke
• (distance measured around any object): girth
• (distance measured around a race track): lap
Verb
circumference (third-person singular simple present circumferences, present participle circumferencing, simple past and past participle circumferenced)
(obsolete, transitive) To include in a circular space; to bound.
Source: Wiktionary
Cir*cum"fer*ence, n. Etym: [L. 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.
Cir*cum"fer*ence, v. t.
Definition: To include in a circular space; to bound. [Obs.] Sir T. Browne.
Source: Webster’s Unabridged Dictionary 1913 Edition