• synonyms


[kwin-kwen-ee-uh l, kwing-]
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  1. of or lasting for five years.
  2. occurring every five years.
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  1. something that occurs every five years.
  2. a fifth anniversary.
  3. a five-year term in office.
  4. a quinquennium.
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Origin of quinquennial

1425–75; late Middle English < Latin quīnquenni(s) of five years + -al1
Related formsquin·quen·ni·al·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for quinquennial


  1. occurring once every five years or over a period of five years
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  1. another word for quinquennium
  2. a fifth anniversary
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Derived Formsquinquennially, 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 quinquennial


late 15c., "lasting five years," from Latin quinquennis "of five years, celebrated every fifth year," from quinque- "five" (see quinque-) + ending from biennial, etc. Meaning "happening once every five years" attested from c.1600. As a noun from 1895; earlier quinquennal (1610s).

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Online Etymology Dictionary, © 2010 Douglas Harper