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Definition of circumference

circumference

/sərˈkʌmfərəns/
cir · cum · fer · ence
Adverb:circumferentially
•
Plural:circumferences
•
Adjective:circumferential
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circumference Lexical Profile

circumference Game Scores & Validity

• noun

1

The enclosing boundary of a curved geometric figure, especially a circle, or the linear distance around it.

Example

"To calculate the circumference of the circle, multiply its diameter by pi."

2

The distance around something rounded or cylindrical, such as a tree trunk or a person's waist.

Example

"The ancient redwood tree had a base circumference of more than seventy feet."

Synonyms
View all synonyms for circumference
Antonyms
View all antonyms for circumference

Word Nuance & Usage

In strict geometry, 'circumference' refers specifically to the boundary of a circle or ellipse, whereas 'perimeter' is the general term used for polygons and other shapes with straight sides.

• Rhymes for circumference

• Nearby Words

circulatory
circumcise
circumcision
circumference
circumferential
circumflex
circumnavigate

Word Origin & Etymology

Borrowed in the late 14th century from Old French circonference and Latin circumferentia, from circumferre ('to carry around, lead around'), formed from circum ('around') and ferre ('to bear, carry').

Cite this Entry

Wordmom. (2026). Definition of Circumference. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/circumference
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