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English definition of “circumference”

circumference

noun [C/U]  /sərˈkəm·fər·əns/ us  
geometry the distance around a circle: [U] Draw a circle 5 inches in circumference. A circumference is also the distance around the widest part of a round object, or a line enclosing a circular space. The circumference of an area of any size or shape is its complete outside edge: [C] We walked the circumference of the field so we wouldn’t interrupt the game.
(Definition of circumference from the Cambridge Academic Content Dictionary © Cambridge University Press)
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