definition of
circumference

[1] #1 circumference n. [perimeter] the size of something as given by the distance around it. wn

[2] #2 circumference n. [circuit] the boundary line encompassing an area or object; "he had walked the full circumference of his land"; "a danger to all races over the whole circumference of the globe". wn

[3] #3 circumference n. the length of the closed curve of a circle. wn