Meaning of “biennial” in the English Dictionary

"biennial" in American English

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biennialadjective [ not gradable ]

us /bɑɪˈen·i·əl/

happening once every two years:

a biennial exhibit

biennialnoun [ C ]

us /bɑɪˈen·i·əl/

a plant that lives for two years, producing seeds and flowers in its second year

(Definition of “biennial” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"biennial" in Business English

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biennialadjective

uk /baɪˈeniəl/ us

happening once every two years:

a biennial conference
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biennially
adverb

City residents are surveyed on their views biennially.

(Definition of “biennial” from the Cambridge Business English Dictionary © Cambridge University Press)