triennial
adjective
tri·en·ni·al
(ˌ)trī-ˈe-nē-əl 
1
: occurring or being done every three years
the triennial convention
2
: consisting of or lasting for three years
a triennial contract
triennial
noun
Examples of triennial in a Sentence
Recent Examples on the Web
The triennial runs until 19 October 2025 and features 18 artists from 15 countries, all whom have created new commissions scattered along the waterfront and throughout the town.
—
Joanne Shurvell, Forbes.com, 26 Aug. 2025
For Chicago taxpayers, the wait will be especially irksome because many of them are likely to see painful increases, reflecting this year’s triennial reassessment of city properties, the effects of which will be first seen in the second-installment bills.
—The Editorial Board, Chicago Tribune, 14 May 2025
The triennial Sloan Film Summit from nonprofit arts organization Film Independent is back for 2025.
—Samantha Bergeson, IndieWire, 7 May 2025
The triennial event brings together member organizations from Latin America to celebrate the impact of the global Girl Scout movement.
—Ale Delgado, San Diego Union-Tribune, 13 Mar. 2025
See All Example Sentences for triennial
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Joanne Shurvell, Forbes.com, 26 Aug. 2025
For Chicago taxpayers, the wait will be especially irksome because many of them are likely to see painful increases, reflecting this year’s triennial reassessment of city properties, the effects of which will be first seen in the second-installment bills.
—The Editorial Board, Chicago Tribune, 14 May 2025
The triennial Sloan Film Summit from nonprofit arts organization Film Independent is back for 2025.
—Samantha Bergeson, IndieWire, 7 May 2025
The triennial event brings together member organizations from Latin America to celebrate the impact of the global Girl Scout movement.
—Ale Delgado, San Diego Union-Tribune, 13 Mar. 2025
See All Example Sentences for triennial
Cite this Entry
“Triennial.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/triennial. Accessed 18 Sep. 2025.
Copy CitationKids Definition
triennial
adjective
tri·en·ni·al
(ˈ)trī-ˈen-ē-əl
1
: consisting of or lasting for three years
2
: occurring or being done every three years
triennial
noun
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