- occurring twice a year; semiannual.
- occurring every two years; biennial.
Origin of biannual
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for bi-annual
The typically somber atmosphere at the bi-annual church convocation was punctuated by hollers, applause and a shout of “brill!”Church of England Gets Female Bishops and a Conservative Backlash
July 14, 2014
Next Tuesday, the president will host hundreds of reporters for his bi-annual press conference.French President François Hollande Slams Affair Allegations
January 11, 2014
Associated words: half-yearly, semi-annual, bi-annual, semestral.Putnam's Word Book
Louis A. Flemming
The only romantic visitors are the storks, who use it as an aerodrome on their bi-annual migrations.Caught by the Turks
During the first ten years the sessions were bi-annual, but since 1895 have been held every five years.
All-night vigils in search of bargains are frequent at the bi-annual sale-festivals.Women's Wild Oats
C. Gasquoine Hartley
- occurring twice a yearCompare biennial
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
Online Etymology Dictionary, © 2010 Douglas Harper