Dictionary

triennial

adjective tri·en·ni·al \(ˌ)trī-ˈe-nē-əl\

Definition of TRIENNIAL

1
:  occurring or being done every three years <the triennial convention>
2
:  consisting of or lasting for three years <a triennial contract>
triennial noun
tri·en·ni·al·ly \-nē-ə-lē\ adverb

First Known Use of TRIENNIAL

1562

Browse

Next Word in the Dictionary: trienniumPrevious Word in the Dictionary: trieneAll Words Near: triennial
April 28, 2015
portmanteau Hear it
a word formed by the blending of words
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears