Definition of swim noun from the Oxford Advanced American Dictionary

     

    swim

     noun
    noun
    NAmE//swɪm//
     
     
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  1. 1[singular] a period of time during which you swim Let's go for a swim.
  2. 2 (in compounds) related to or used for swimming a swim meet (= swimming competition between teams) swim trunks
  3. Idioms
    in the swim (of things)(informal)
     
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    involved in things that are happening in society or in a particular situation Since leaving the company, he's no longer in the swim of things.
See the Oxford Advanced Learner's Dictionary entry: swim