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

Three of Connecticut’s five U.S. House members are 72 or older, age was a difficult and ultimately disqualifying issue for the octogenarian Joe Biden in 2024, and the Democratic Party is in the midst of an identity crisis after the loss of the White House to Donald J. Trump. —Mark Pazniokas, Hartford Courant, 3 July 2025

An 85-year-old man and a second unidentified victim were removed from the burning apartment and rushed to Harlem Hospital, where the octogenarian died. —Thomas Tracy, New York Daily News, 28 June 2025

Director: Cody Sheehy The Hook: Just your typical story about an octogenarian and his favorite manta ray. —Rebecca Rubin, Variety, 4 June 2025

In February, the octogenarian shared a video on his Instagram of the musician performing in a record shop 2016. —Marina Watts, People.com, 11 June 2025

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