triennial
[ trahy-en-ee-uhl ]
/ traɪˈɛn i əl /
adjective
occurring every three years.
lasting three years.
noun
a third anniversary.
something that appears or occurs every three years.
a period of three years; triennium.
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Origin of triennial
First recorded in 1555–65; trienni(um) + -al1
OTHER WORDS FROM triennial
tri·en·ni·al·ly, adverbWords nearby triennial
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Example sentences from the Web for triennial
British Dictionary definitions for triennial
triennial
/ (traɪˈɛnɪəl) /
adjective
relating to, lasting for, or occurring every three years
noun
a third anniversary
a triennial period, thing, or occurrence
Derived forms of triennial
triennially, adverbWord Origin for triennial
C17: from Latin triennium
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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