Definition of icebreaker noun from the Oxford Advanced American Dictionary

     

    icebreaker

     noun
    noun
    NAmE//ˈaɪsˌbreɪkər//
     
     
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  1. 1a strong ship designed to break a way through ice, for example in the Arctic or Antarctic
  2. 2a thing that you do or say, like a game or a joke, to make people feel less nervous when they first meet
See the Oxford Advanced Learner's Dictionary entry: icebreaker