decennial

adjective

de·​cen·​ni·​al di-ˈse-nē-əl How to pronounce decennial (audio)
1
: consisting of or lasting for 10 years
2
: occurring or being done every 10 years
the decennial census
decennial noun
decennially adverb

Examples of decennial in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Edgar Laurence Smith described the decennial pattern in the 1930s. Bill Sarubbi, Forbes.com, 25 Aug. 2025 At the time, Congress recognized a need for more regular data than a decennial census could provide. Ronald J. Hansen, AZCentral.com, 24 Aug. 2025 The process of drawing new voting districts typically happens once every 10 years following the decennial census. Clara Hendrickson, Freep.com, 21 Aug. 2025 In the past, Beijing sent senior Communist Party leaders to Lhasa for each decennial celebration of the regional government — but never the top leader himself. Nectar Gan, CNN Money, 21 Aug. 2025 See All Example Sentences for decennial

Word History

First Known Use

circa 1656, in the meaning defined at sense 1

Time Traveler
The first known use of decennial was circa 1656

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Cite this Entry

“Decennial.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/decennial. Accessed 9 Sep. 2025.

Kids Definition

decennial

adjective
de·​cen·​ni·​al di-ˈsen-ē-əl How to pronounce decennial (audio)
1
: consisting of 10 years
2
: happening every 10 years
decennial census
decennially adverb

More from Merriam-Webster on decennial

Last Updated: - Updated example sentences
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