American English

Definition of biennial adjective from the Oxford Advanced American Dictionary

     

    biennial

     adjective
    adjective
    NAmE//baɪˈɛniəl//
     
    [usually before noun]
     
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  1. happening once every two years a biennial convention
  2.  
    adverb see also annual, biannual
See the Oxford Advanced Learner's Dictionary entry: biennial

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