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.
The 2020 decennial census showed that Aurora had a population of around 180,000, down from 197,000 in 2010 — but city officials have disputed those numbers, arguing that the city’s population is actually closer to the levels found in the 2010 census. R. Christian Smith, Chicago Tribune, 5 June 2025 Redistricting is usually done every 10 years, after the decennial census, but Ohio faces the task now because voters in 2018 amended the state constitution, and maps are only in effect for four years if they are passed without minority support. David Mark, The Washington Examiner, 30 May 2025 The state demographers use the U.S. Census Bureau decennial counts, and then base their estimates on state-specific death, birth and immigration data. Harriet Blair Rowan, Mercury News, 1 May 2025 Daley assembled his own alliance of ethnic whites and Latinos as the 1990 decennial ward remapping process loomed to prop up a wedge against a growing Black influence at City Hall. Alice Yin, Chicago Tribune, 25 May 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 13 Jun. 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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