American English

Definition of pontoon noun from the Oxford Advanced American Dictionary

     

    pontoon

     noun
    noun
    NAmE//pɑnˈtun//
     
     
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  1. 1a temporary floating platform built across several boats or hollow structures, especially one used for tying boats to
  2. 2a boat or hollow structure that is one of several used to support a floating platform or bridge a pontoon bridge
See the Oxford Advanced Learner's Dictionary entry: pontoon