triennial

American  

[trahy-en-ee-uhl] / traɪˈɛn i əl /

adjective

1. occurring every three years.

2. lasting three years.

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noun

1. a third anniversary.

2. something that appears or occurs every three years.

3. a period of three years; triennium.

triennial British  

/ traɪˈɛnɪəl /

adjective

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

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noun

1. a third anniversary

2. a triennial period, thing, or occurrence

Other Word Forms

• triennially adverb

Etymology

Origin of triennial

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

Example Sentences

Still, complications loom — starting with the triennial World Baseball Classic scheduled for next March.

From Los Angeles Times

As African leaders gather in Beijing this week for the triennial China-Africa summit, Chinese President Xi Jinping may have one thing under his belt to boast about - satellite TV.

From BBC

Its first iteration, in 2019, was a hyperlocal concept: a triennial at storefront scale, bringing projects by St. Louis and national artists to parks, bakeries and taquerias on Cherokee Street, on the city’s south side.

From New York Times

Ironically, the United States is scheduled to present its triennial compliance report on Convention 182 this year.

From Washington Post

Smith, 83, also has a commission in Counterpublic, a new triennial in St. Louis, and is curating an exhibition featuring some 50 Native artists at the National Gallery of Art.

From New York Times