Definition of water cooler noun from the Oxford Advanced American Dictionary

     

    water cooler

     noun
    noun
     
     
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  1. 1a machine, for example in an office, that cools water and supplies it for drinking
  2. 2used when referring to a place where office workers talk in an informal way, for example near the water cooler It was a story they'd shared around the water cooler.
See the Oxford Advanced Learner's Dictionary entry: water cooler