circumference

/sərˈkəm·fər·əns/ n [C/U]

Definition

› 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 n from the Cambridge Academic Content Dictionary © Cambridge University Press)