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 effort, requested by Aurora after officials felt the city was undercounted in the 2020 decennial census, will be focused only around certain areas that have been recently developed. R. Christian Smith, Chicago Tribune, 3 June 2026 The best time to do it would be before the next redistricting cycle, which is supposed to be in 2032, after the next decennial census. Mary Ellen Klas, Boston Herald, 1 June 2026 The best time to do it would be before the next redistricting cycle, which is supposed to be in 2032, after the next decennial census. Mary Ellen Klas, Mercury News, 26 May 2026 The tradition Democrats were trying to protect was only redistricting after the decennial census, in order to ensure accurate representation rather than partisan advantage. Hanna Rosin, The Atlantic, 14 May 2026 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

Browse Nearby Words

Cite this Entry

“Decennial.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/decennial. Accessed 11 Jun. 2026.

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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster