American English

Definition of uncommon adjective from the Oxford Advanced American Dictionary



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  1. 1not existing in large numbers or in many places synonym rare, unusual an uncommon occurrence Side effects from the drug are uncommon. It is not uncommon for college students to live at home. Red squirrels are not uncommon in this area. opposite common
  2. 2(formal or literary) unusually large in degree or amount; great synonym remarkable She showed uncommon pleasure at his arrival.
See the Oxford Advanced Learner's Dictionary entry: uncommon