[sem-ee-an-yoo-uh l, sem-ahy-]
See more synonyms for semiannual on

Origin of semiannual

First recorded in 1785–95; semi- + annual
Related formssem·i·an·nu·al·ly, adverb
Can be confusedbiannual biennial semiannual (see usage note at bi-1)

Usage note

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

Related Words for semi-annual

semiannual, biannual, semiyearly

Examples from the Web for semi-annual

Contemporary Examples of semi-annual

  • Trump was in New Orleans for the Republican Leadership Conference, a semi-annual conservative confab.

    The Daily Beast logo
    Donald Trump Is Still A Birther

    David Freedlander

    May 30, 2014

  • Federal Reserve Chair Janet Yellen goes before the Senate Banking Committee to give a semi-annual monetary policy testimony.

  • His signature blue jacket is a Parisian street sweeper's smock purchased on his semi-annual trips to Paris.

    The Daily Beast logo
    Knowing Bill Cunningham

    Philip Gefter

    March 22, 2010

  • The four officials preside over semi-annual meetings on every topic under the sun.

    The Daily Beast logo
    We're Handling China All Wrong

    Jeffrey E. Garten

    February 17, 2010

Historical Examples of semi-annual

British Dictionary definitions for semi-annual


  1. occurring every half-year
  2. lasting for half a year
Derived Formssemiannually, 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 semi-annual

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

Online Etymology Dictionary, © 2010 Douglas Harper