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

     

    blowhole

     noun
    noun
    BrE BrE//ˈbləʊhəʊl//
     
    ; NAmE NAmE//ˈbloʊhoʊl//
     
     
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  1. 1 a hole in the top of a whale’s head through which it breathes
  2. 2a hole in a large area of ice, through which seals, etc. breathe
See the Oxford Advanced American Dictionary entry: blowhole