English

Definition of biennial adjective from the Oxford Advanced Learner's Dictionary

 

biennial

 adjective
adjective
BrE BrE//baɪˈeniəl//
 
; NAmE NAmE//baɪˈeniəl//
 
 
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[usually before noun] happening once every two years a biennial convention Word Origin early 17th cent.: from Latin biennis (from bi- ‘twice’ + annus ‘year’) + -al.
See the Oxford Advanced American Dictionary entry: biennial

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