Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of triennial is as below...

Trieterical :: Trieterical (a.) Kept or occurring once in three years; triennial.

Triennial :: Triennial (a.) Happening, coming about, or appearing once in every three years; as, triennial elections; a triennial catalogue; a triennial visitation..

Triennial :: Triennial (n.) Something which takes place or appears once in three years.

Triennial :: Triennial (a.) Continuing three years; as, triennial parliaments; a triennial reign..

Triennially :: Triennially (adv.) Once in three years.

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