› the line surrounding a circular space, or the length of this line: the circumference of a circleProperties of circles and curves › the outside edge of an area or object that is round or curved, or the length of this edge: the circumference of an orangeProperties of circles and curvesEdges and extremities of objectsSurfaces of objectsParts of geometrical shapes

(Definition of circumference from the Cambridge Advanced Learners Dictionary & Thesaurus
© Cambridge University Press)

What is the pronunciation of circumference?
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