circumference

Noun
  1. The size of something as given by the distance around it (synset 105108523)
  2. The boundary line encompassing an area or object (synset 108531740)
    "he had walked the full circumference of his land"; "a danger to all races over the whole circumference of the globe"
  3. The length of the closed curve of a circle (synset 105108937)

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