Definition of circumference noun from the Oxford Advanced Learner's Dictionary



BrE BrE//səˈkʌmfərəns//
; NAmE NAmE//sərˈkʌmfərəns//
[countable, uncountable] Mathematical terminology
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a line that goes around a circle or any other curved shape; the length of this line the circumference of the earth The earth is almost 25 000 miles in circumference. the circumference of a circle compare perimeter See related entries: Mathematical terminology Word Originlate Middle English: from Old French circonference, from Latin circumferentia, from circum ‘around, about’ + ferre ‘carry, bear’.
See the Oxford Advanced American Dictionary entry: circumference