Definition of quinquennial
1 : consisting of or lasting for five years
2 : occurring or being done every five years
quinquenniallyplay \kwin-ˈkwe-nē-ə-lē, kwiŋ-\ adverb
First Known Use of quinquennial
Learn More about quinquennial
Seen and Heard
What made you want to look up quinquennial? Please tell us where you read or heard it (including the quote, if possible).