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biannual

[bahy-an-yoo-uh l]
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adjective
  1. occurring twice a year; semiannual.
  2. occurring every two years; biennial.
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Origin of biannual

First recorded in 1875–80; bi-1 + annual
Related formsbi·an·nu·al·ly, adverb
Can be confusedbiannual biennial semiannual (see usage note at bi-1)

Usage note

See bi-1.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for bi-annual

semiannual, biannual, semiyearly

Examples from the Web for bi-annual

Contemporary Examples of bi-annual

Historical Examples of bi-annual


British Dictionary definitions for bi-annual

biannual

adjective
  1. occurring twice a yearCompare biennial
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Derived Formsbiannually, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for bi-annual

biannual

adj.

also bi-annual; "occurring every six months, twice a year," 1837, from bi- + annual. Related: Biannually; bi-annually.

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Online Etymology Dictionary, © 2010 Douglas Harper