Definition of backwash noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈbækwɒʃ//
    ; NAmE NAmE//ˈbækwɔːʃ//
    , NAmE//ˈbækwɑːʃ//
    [singular, uncountable] Travelling by boat or ship
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  1. 1the unpleasant result of an event
  2. 2waves caused by a boat moving through water; the movement of water back into the sea after a wave has hit the beach See related entries: Travelling by boat or ship
See the Oxford Advanced American Dictionary entry: backwash