Definition of flipper noun from the Oxford Advanced American Dictionary

     

    flipper

     noun
    noun
    NAmE//ˈflɪpər//
     
    [usually plural]
     
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  1. 1a flat part of the body of some sea animals such as seals and turtles, used for swimming
  2. 2 a long flat piece of rubber or plastic that you wear on your foot to help you swim more quickly, especially below the surface of the water
See the Oxford Advanced Learner's Dictionary entry: flipper