Definition of circumference in English:


Syllabification: cir·cum·fer·ence
Pronunciation: /sərˈkəmf(ə)rəns
(abbreviation: cir., circ., or circum.)


1The enclosing boundary of a curved geometric figure, especially a circle.
More example sentences
  • His last work was on the cycloid, the curve traced by a point on the circumference of a rolling circle.
  • The perimeter of the inner polygon is shorter than the circumference of the circle.
  • We should have a polygon inscribed in the circle the sides of which coincide with the circumference of the circle.
perimeter, border, boundary;
literary marge
1.1The distance around something: babies who have small head circumferences two inches in circumference
More example sentences
  • A hailstone with a 7-inch diameter and a circumference of 18.75 inches was recently named the largest hailstone ever recovered in the United States.
  • After measuring a drum shade, add 1 inch to the circumference and 3 inches to the height.
  • The winner of the under ten category was Scarlet, whose pumpkin had a circumference of 57 inches.


late Middle English: from Old French circonference, from Latin circumferentia, from circum 'around, about' + ferre 'carry, bear'.



Pronunciation: /sərˌkəmfəˈrenCHəl/
More example sentences
  • With large or full-thickness burns, hospitalization may be necessary, especially if the patient has circumferential burns of the neck or extremity.
  • The block is bounded to west and south by via Piave, a circumferential street which perhaps marks an early town wall.
  • These larger crystals sometimes exhibit circumferential ridges.


More example sentences
  • In early European history, pointed spears or palisades circumferentially surrounded many castles for protection.
  • Microtubules are rigid, hollow cylindrical structures, each consisting of 10 to 15 parallel protofilaments arranged circumferentially.
  • These can be used individually or in combination, and are injected circumferentially around the periphery of the lesion during surgery.

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