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semiannual

[sem-ee-an-yoo-uh l, sem-ahy-] /ˌsɛm iˈæn yu əl, ˌsɛm aɪ-/
adjective
1.
occurring, done, or published every half year or twice a year; semiyearly.
2.
lasting for half a year:
a semiannual plant.
Origin
1785-1795
1785-95; semi- + annual
Related forms
semiannually, adverb
Can be confused
biannual, biennial, semiannual (see usage note at bi-)
Usage note
See bi-1.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for semi-annual

semiannual

/ˌsɛmɪˈænjʊəl/
adjective
1.
occurring every half-year
2.
lasting for half a year
Derived Forms
semiannually, 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
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Word Origin and History for semi-annual
adj.

also semiannual, 1775, from semi- + annual. Related: Semiannually.

Online Etymology Dictionary, © 2010 Douglas Harper
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6
7
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