triennial

[ trahy-en-ee-uhl ]

adjective

1. occurring every three years.
2. lasting three years.

noun

1. a third anniversary.
2. something that appears or occurs every three years.
3. a period of three years; triennium.

triennial

/ traɪˈɛnɪəl /

adjective

1. relating to, lasting for, or occurring every three years

noun

1. a third anniversary
2. a triennial period, thing, or occurrence

Derived Forms

• triˈennially, adverb

Other Words From

• tri·enni·al·ly adverb

Word History and Origins

Origin of triennial¹

First recorded in 1555–65; trienni(um) + -al ¹

Word History and Origins

Origin of triennial¹

C17: from Latin triennium

Example Sentences

The Daily Pic: The ICP's latest triennial expands what cameras can do.

From The Daily Beast

For years, the triennial confab has been remarkable mostly for airy oratory by national leaders playing to the crowd back home.

From The Daily Beast

The Daily Pic: At the New Museum Triennial, artists get ad men to polish communism's image.

From The Daily Beast

It is one of the best works in the second New Museum triennial, which this time out has been titled “The Ungovernables.”

From The Daily Beast

Lupton, Cara McCarty, Matilda McQuaid, and Cynthia Smith curated the Triennial.

From The Daily Beast

He maintained the connexion of church and state, and opposed triennial parliaments and the ballot.

From Project Gutenberg

The war mortality is excluded in every case where it was separately stated in the college Triennial, as indicated below.

From Project Gutenberg

The dreadful disorders of frequent elections have also necessitated a septennial instead of a triennial duration.

From Project Gutenberg

I do not seriously think this Constitution, even to the wrecks of it, could survive five triennial elections.

From Project Gutenberg

In some parishes a Triennial or even Septennial visit to the boundaries is considered sufficient.

From Project Gutenberg