Triennial in a sentence as a noun

He forgot to mention he has purchased a steel foundry for the triennial purpose of zeroed-out drive disposal.

In addition to participating in it every triennial cycle but one, we have also strongly criticized it.

Triennial in a sentence as an adjective

There is a triennial process for getting such exemptions made, which the EFF in 2006 called "fundamentally broken", but yet returned to participating in in 2009.

Even triennial intake is probably enough to let applicants time applications to meet their hierarchy of preferences.

Triennial definitions

noun

the 300th anniversary (or the celebration of it)

See also: tercentennial tercentenary

adjective

occurring every third year or lasting 3 years