1. (

• circumference ,
• perimeter

) the size of something as given by the distance around it ;

2. (

• circumference ,
• 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" ;

3. (

• circumference ,

) the length of the closed curve of a circle ;