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

In many categories, octogenarians act as sponsor, advisor or final approver. — Ray Lansigan, Forbes.com, 22 July 2026

Florida is also preparing to execute its first octogenarian later this month. — Harriet Marsden, TheWeek, 16 July 2026

Occhione may not be the last octogenarian whom DeSantis executes. — Orlando Sentinel, The Orlando Sentinel, 8 July 2026

Scientists have reliable data for octogenarians and nonagenarians—one research project, the Harvard Study of Adult Development, has been running since 1938—and the lessons are clear enough. — Dhruv Khullar, New Yorker, 29 June 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

• antiquarian
• libertarian
• millenarian
• nonsectarian
• proletarian
• sanitarian
• trinitarian
• unitarian
• vegetarian
• veterinarian
• agrarian
• aquarian

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