AskDefine | Define triennial

Dictionary Definition

triennial adj : occurring every third year or lasting 3 years n : the 300th anniversary (or the celebration of it) [syn: tercentennial, tercentenary]

User Contributed Dictionary



  1. happening every three years.
  2. lasting for three years.


  1. A third anniversary.

Extensive Definition

Continuing three years: happening every third year

Synonyms, Antonyms and Related Words

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