- 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 biannual
Some things about the biannual New York Fashion Week remain reassuringly constant.Who to See and Where to be Seen: The Hot Tips for New York Fashion Week
September 3, 2014
And this month she launches the third issue of her biannual magazine, CR Fashion Book, which made its debut a year ago.Carine Roitfeld Documentary ‘Mademoiselle C’ Offers Intimate Look
September 11, 2013
Earlier this month Airbus announced the winning idea for its biannual student competition.Airline Pilots Ditch Charts and Paperwork for iPads to Save Money and Fuel
June 28, 2013
Give your wallet a break and mark your calendar for Glow, the dusk-to-dawn biannual art event on Santa Monica Beach.Gal With a Suitcase
June 18, 2010
- occurring twice a yearCompare biennial
Word Origin and History for biannual
Online Etymology Dictionary, © 2010 Douglas Harper