[ kwin-kwen-ee-uh l, kwing- ]
/ kwɪnˈkwɛn i əl, kwɪŋ- /


of or lasting for five years.
occurring every five years.


something that occurs every five years.
a fifth anniversary.
a five-year term in office.
a quinquennium.

Origin of quinquennial

1425–75; late Middle English < Latin quīnquenni(s) of five years + -al1

Related forms

quin·quen·ni·al·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for quinquennial

British Dictionary definitions for quinquennial


/ (kwɪnˈkwɛnɪəl) /


occurring once every five years or over a period of five years


another word for quinquennium
a fifth anniversary

Derived Forms

quinquennially, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012