1.Definition: 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"

Related Noun(s):circuit

Category: Places

2.Definition: the length of the closed curve of a circle

Category: General

3.Definition: the size of something as given by the distance around it

Related Noun(s):perimeter

Category: General