octogenarian

noun

oc·​to·​ge·​nar·​i·​an ˌäk-tə-jə-ˈner-ē-ən How to pronounce octogenarian (audio)
Synonyms of octogenariannext
: a person whose age is in the eighties
The octogenarian uses a cane for walking.
octogenarian adjective

Examples of octogenarian 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.
Extending the life of an octogenarian does not have the same social impact as saving a young person in the prime of life or a child with decades of productive years ahead. James Broughel, Forbes.com, 27 Jan. 2026 Investigators claim that the daughter of the unidentified octogenarian trusted Guarino with blank checks meant to be used to pay herself and the other caretakers, as well as cover her disabled mother’s expenses. Brian Niemietz, New York Daily News, 21 Jan. 2026 Wide-Leg Pants Levi’s Women 318 Shaping Wide Leg From teens to octogenarians, stylish Parisian women are wearing wide-leg pants in all waist heights. Renée Reardin, InStyle, 17 Jan. 2026 The first generation of Iranian revolutionaries—including octogenarians like Ayatollah Ali Khamenei—have long fooled themselves about their future. Robin Wright, New Yorker, 13 Jan. 2026 See All Example Sentences for octogenarian

Word History

Etymology

Latin octogenarius containing eighty, from octogeni eighty each, from octoginta eighty, from octo eight + -ginta (akin to viginti twenty) — more at vigesimal

First Known Use

1815, in the meaning defined above

Time Traveler
The first known use of octogenarian was in 1815

Browse Nearby Words

Cite this Entry

“Octogenarian.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/octogenarian. Accessed 5 Feb. 2026.

Kids Definition

octogenarian

noun
oc·​to·​ge·​nar·​i·​an ˌäk-tə-jə-ˈner-ē-ən How to pronounce octogenarian (audio)
: a person whose age is between 80 and 89

Medical Definition

octogenarian

noun
oc·​to·​ge·​nar·​i·​an ˌäk-tə-jə-ˈner-ē-ən How to pronounce octogenarian (audio)
: a person whose age is in the eighties
octogenarian adjective

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