Definition of U-turn noun from the Oxford Advanced American Dictionary

     

    U-turn

     noun
    noun
     
     
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  1. 1a turn of 180° that a vehicle makes so that it can move forward in the opposite direction to do/make a U-turn
  2. 2(informal) a complete change in policy or behavior, usually one that is embarrassing
See the Oxford Advanced Learner's Dictionary entry: U-turn