adjective, un·com·mon·er, un·com·mon·est.

  1. not common; unusual; rare: an uncommon word.
  2. unusual in amount or degree; above the ordinary: an uncommon amount of mail.
  3. exceptional; remarkable.


  1. outside or beyond normal experience, conditions, etc; unusual
  2. in excess of what is normalan uncommon liking for honey


  1. an archaic word for uncommonly (def. 2)

adj.1540s, “not possessed in common,” from un- (1) “not” + common (adj.). Meaning “not commonly occurring, unusual, rare” is recorded from 1610s. Related: Uncommonly.

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