biannual

[bahy-an-yoo-uh l]

adjective

occurring twice a year; semiannual.

occurring every two years; biennial.

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. 2019

Examples from the Web for biannually

Historical Examples of biannually

The economic assessment of the country is assessed quarterly and biannually.
After the Rain
Sam Vaknin

British Dictionary definitions for biannually

biannual

adjective

occurring twice a yearCompare biennial

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 biannually

biannual

adj.

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