What does triennial mean?
Triennial means Happening every three years..
/tɹaɪˈɛni.əl/ · adjective
Happening every three years..
triennial elections
They were constantly summoned to a triennial festival : and the most approved songs delivered at this assembly were ordered to be preserved in the custody of the king's historian or antiquary
triennial parliaments; a triennial reign
September 13 1621, James Howell. letter to Sir William Saint John Triennial Subsidies
Choose a synonym only when it preserves the intended meaning, tone, and grammar of the full sentence.
Triennial means Happening every three years..
Common synonyms include trieterical, tercentenary, tercentennial.
The opposite depends on the specific sense.
triennial elections
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