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quadrennial

[kwo-dren-ee-uh l] /kwɒˈdrɛn i əl/
adjective
1.
occurring every four years:
a quadrennial festival.
2.
of or lasting for four years:
a quadrennial period.
noun
3.
an event occurring every four years, as an anniversary or its celebration.
Origin of quadrennial
1640-1650
1640-50; earlier quadriennial < Latin quadrienni(um) (see quadrennium) + -al1
Related forms
quadrennially, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for quadrennial

quadrennial

/kwɒˈdrɛnɪəl/
adjective
1.
occurring every four years
2.
relating to or lasting four years
noun
3.
a period of four years
Derived Forms
quadrennially, 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
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Word Origin and History for quadrennial
adj.

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
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