Definition of circular adjective from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈsɜːkjələ(r)//
    ; NAmE NAmE//ˈsɜːrkjələr//
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  1. 1shaped like a circle; round a circular building He had round unblinking eyes and a perfectly circular head. The crater was two miles across and roughly circular.
  2. 2moving around in a circle a circular tour of the city Using small circular movements, massage the muscles on either side of the spine.
  3. 3(of an argument or a theory) using an idea or a statement to prove something which is then used to prove the idea or statement at the beginning
  4. 4(of a letter) sent to a large number of people
  5. Word Originlate Middle English: from Old French circulier, from late Latin circularis, from Latin circulus ‘small ring’, diminutive of circus ‘ring’.
See the Oxford Advanced American Dictionary entry: circular