American English

Definition of twin adjective from the Oxford Advanced American Dictionary



    [only before noun]
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  1. 1used to describe one of a pair of children who are twins twin boys/girls a twin brother/sister
  2. 2used to describe two things that are used as a pair a ship with twin propellers
  3. 3used to describe two things that are connected, or present or happening at the same time The prison service has the twin goals of punishment and rehabilitation.
See the Oxford Advanced Learner's Dictionary entry: twin