American English

Definition of lagoon noun from the Oxford Advanced American Dictionary

     

    lagoon

     noun
    noun
    NAmE//ləˈɡun//
     
     
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  1. 1a lake of salt water that is separated from the ocean by a reef or an area of rock or sand
  2. 2 a small area of fresh water near a lake or river We loved to go swimming in the lagoon.
  3. 3(technology) an artificial area built to hold waste water before it is treated at a sewage treatment plant
See the Oxford Advanced Learner's Dictionary entry: lagoon