Triennial definition

trī-ĕnē-əl
A third anniversary.
noun
1
0
Occurring every third year.
adjective
0
0
Lasting three years.
adjective
0
0
A ceremony or celebration occurring every three years.
noun
0
0
Happening every three years.
adjective
0
0
Advertisement
Lasting three years.
adjective
0
0
A triennial event or occurrence.
noun
0
0

Triennial elections.

adjective
0
0
Lasting for three years.

Triennial parliaments; a triennial reign.

adjective
0
0
A third anniversary.
noun
0
0
Advertisement

Other Word Forms

Noun

Singular:
triennial
Plural:
triennials

Origin of triennial

  • From Latin triennis from triennium triennium triennium

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin triennium (“three-year period"), from tres (“three") + annus (“year").

    From Wiktionary