[ kwo-dren-ee-uh l ]
/ kwɒˈdrɛn i əl /


occurring every four years: a quadrennial festival.
of or lasting for four years: a quadrennial period.


an event occurring every four years, as an anniversary or its celebration.

Nearby words

  1. quadrature,
  2. quadrature of the circle,
  3. quadratus,
  4. quadrel,
  5. quadrella,
  6. quadrennium,
  7. quadri-,
  8. quadriad,
  9. quadribasic,
  10. quadric

Origin of quadrennial

1640–50; earlier quadriennial < Latin quadrienni(um) (see quadrennium) + -al1

Related formsquad·ren·ni·al·ly, adverb

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for quadrennial

British Dictionary definitions for quadrennial


/ (kwɒˈdrɛnɪəl) /


occurring every four years
relating to or lasting four years


a period of four years
Derived Formsquadrennially, 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

Word Origin and History for quadrennial



1650s, "lasting four years;" as "happening once every four years," 1701; from quadri- + ending from biennial, etc. Correct formation would be quadriennial (cf. Latin quadriennium "period of four years"). As a noun from 1640s. Related: Quadrennially.

Online Etymology Dictionary, © 2010 Douglas Harper