Definition of Triennial

Adjective: triennial  trI'e-nee-ul

1. Occurring every third year or lasting 3 years

1. The 300th anniversary (or the celebration of it)
   - tercentennial, tercentenary

See also:
triennia
triennially

Anagrams containing the word triennial

tnleirina ltriennia altrienni ialtrienn nialtrien nnialtrie ennialtri iennialtr riennialt