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noun no·na·ge·nar·i·an \ˌnō-nə-jə-ˈner-ē-ən, ˌnä-\

Simple Definition of nonagenarian

  • : a person who is between 90 and 99 years old

Source: Merriam-Webster's Learner's Dictionary

Full Definition of nonagenarian

  1. :  a person whose age is in the nineties



Origin and Etymology of nonagenarian

Latin nonagenarius containing ninety, from nonageni ninety each, from nonaginta ninety, from nona- (akin to novem nine) + -ginta (akin to viginti twenty) — more at nine, vigesimal

First Known Use: 1804

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