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Noun: circumference  sur'kúm-fu-run(t)s
  1. The size of something as given by the distance around it
    - perimeter
  2. 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
  3. The length of the closed curve of a circle

Derived forms: circumferences

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

Encyclopedia: Circumference