'Quinquennial' definitions:

Definition of 'Quinquennial'

From: GCIDE
  • Quinquennial \Quin*quen"ni*al\, a. [L. quinquennalis and quinquennis; quinque five + annus year. See Five, and cf. Biennial.] Occurring once in five years, or at the end of every five years; also, lasting five years. A quinquennial event. [1913 Webster]