Try Our Apps


90s Slang You Should Know


[sem-ee-an-yoo-uh l, sem-ahy-] /ˌsɛm iˈæn yu əl, ˌsɛm aɪ-/
occurring, done, or published every half year or twice a year; semiyearly.
lasting for half a year:
a semiannual plant.
Origin of semiannual
First recorded in 1785-95; semi- + annual
Related forms
semiannually, adverb
Can be confused
biannual, biennial, semiannual (see usage note at bi-)
Usage note
See bi-1. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
Cite This Source
Examples from the Web for semi-annual
Contemporary Examples
Historical Examples
  • A triumphant "semi-annual examination" was held and Anne's pupils acquitted themselves splendidly.

    Anne Of Avonlea Lucy Maud Montgomery
  • These semi-annual sprees had been among the girl's earliest recollections.

    Prairie Flowers James B. Hendryx
  • The semi-annual public examination was to be held on Monday afternoon, the day before Christmas.

  • In the city they get "a sufficiency of food" and a "semi-annual distribution of clothing."

  • So Constance had proposed that there should be semi-annual reunions at her home for as many as could come.

    Dolly's College Experiences Mabel Cronise Jones
  • Skin lodges were used when traveling or upon the semi-annual hunt.

    Legends of The Kaw Carrie de Voe
British Dictionary definitions for semi-annual


occurring every half-year
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
Cite This Source
Word Origin and History for semi-annual

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

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source

Word of the Day

Difficulty index for semiannual

Few English speakers likely know this word

Word Value for semi

Scrabble Words With Friends

Nearby words for semi-annual