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Noun: circumference  sur'kúm-fu-run(t)s
  1. The size of something as given by the distance around it
    "They measured the circumference of the tree trunk";
    - perimeter
     
  2. The length of the closed curve of a circle
    "The circumference of the circular pool was calculated using pi and the diameter"
     
  3. The boundary line encompassing an area or object
    "a danger to all races over the whole circumference of the globe"; "he had walked the full circumference of his land";
    - circuit

Derived forms: circumferences

Type of: border, borderline, boundary line, delimitation, length, mete, size

Encyclopedia: Circumference