octogenarian

noun

oc·​to·​ge·​nar·​i·​an ˌäk-tə-jə-ˈner-ē-ən 

: 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

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

Jay Mallin | Bloomberg | Getty Images Oracle said Friday that two longtime directors, both octogenarians, have resigned from the board. —Jordan Novet, CNBC, 9 Jan. 2026

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

Rhymes for octogenarian

• authoritarian
• communitarian
• disciplinarian
• egalitarian
• equalitarian
• humanitarian
• majoritarian
• parliamentarian
• radiolarian
• totalitarian
• utilitarian
• agrarian

Kids Definition

octogenarian

noun

oc·​to·​ge·​nar·​i·​an ˌäk-tə-jə-ˈner-ē-ən 

: 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 

: a person whose age is in the eighties

octogenarian adjective