centenarian

noun

cen·​te·​nar·​i·​an ˌsen-tə-ˈner-ē-ən How to pronounce centenarian (audio)
-ˈne-rē-
Synonyms of centenariannext
: one that is 100 years old or older
centenarian adjective

Did you know?

We can't say there are exactly 100 English words based on the Latin root centum, meaning "hundred," but there are certainly dozens. "Centenarian" isn't the oldest one; it only dates from the late 1700s. Far older is "centurion" (an ancient Roman military officer), which has been around since the 13th century. A younger "centum" offspring is "centisecond," a rare term for 1/100 of a second that dates from the 1950s. From colorful words such as "centicipitous" (which means "100-headed") to practical ones like "centgener" ("a device for planting 100 seeds"), "centum" descendants have enlivened our language for centuries.

Examples of centenarian 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.
At this moment, there are more living centenarians who are mothers than at any time in human history. Andre Mouchard, Daily News, 9 May 2026 Sir David Attenborough is almost a centenarian. Kelli Bender, PEOPLE, 5 May 2026 Given the number of centenarians is expected to quadruple by 2054, Coughlin and his collaborators developed a comprehensive way to plan for aging. Allison Aubrey, NPR, 4 May 2026 At 105 years old, Roselle resident Nancy Lally is part of a group of centenarians whose names are on the Irish census of 1926, which the National Archives of Ireland digitized and publicly unveiled earlier this month after a century spent sealed by law. Tess Kenny, Chicago Tribune, 28 Apr. 2026 See All Example Sentences for centenarian

Word History

First Known Use

1747, in the meaning defined above

Time Traveler
The first known use of centenarian was in 1747

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Cite this Entry

“Centenarian.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/centenarian. Accessed 15 May. 2026.

Kids Definition

centenarian

noun
cen·​te·​nar·​i·​an ˌsent-ᵊn-ˈer-ē-ən How to pronounce centenarian (audio)
: a person 100 years old or older
centenarian adjective

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