occurring every three years.
lasting three years.
a third anniversary.
something that appears or occurs every three years.
- tri·en·ni·al·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use triennial in a sentence
The Daily Pic: The ICP's latest triennial expands what cameras can do.
For years, the triennial confab has been remarkable mostly for airy oratory by national leaders playing to the crowd back home.Summit of the Americas in Cartagena Will Be a Minefield for Obama | Mac Margolis | April 13, 2012 | THE DAILY BEAST
The Daily Pic: At the New Museum triennial, artists get ad men to polish communism's image.
It is one of the best works in the second New Museum triennial, which this time out has been titled “The Ungovernables.”
Lupton, Cara McCarty, Matilda McQuaid, and Cynthia Smith curated the triennial.
He maintained the connexion of church and state, and opposed triennial parliaments and the ballot.
The war mortality is excluded in every case where it was separately stated in the college triennial, as indicated below.The Education of American Girls | Anna Callender Brackett
The dreadful disorders of frequent elections have also necessitated a septennial instead of a triennial duration.Thoughts on the Present Discontents | Edmund Burke
I do not seriously think this Constitution, even to the wrecks of it, could survive five triennial elections.Thoughts on the Present Discontents | Edmund Burke
In some parishes a triennial or even Septennial visit to the boundaries is considered sufficient.Curious Church Customs | Various
British Dictionary definitions for triennial
relating to, lasting for, or occurring every three years
a third anniversary
a triennial period, thing, or occurrence
- triennially, 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