US /ˌɑktəd͡ʒɪˈnɛɹiən/ UK /ˌɒktəd͡ʒɪˈnɛəɹɪən/
noun adj Freq #86719

Meanings

  1. 1
    noun

    A person between 80 and 89 years old.

    The marathon was won, remarkably, by an octogenarian.

  2. 2
    adj

    Being between 80 and 89 years old.

    The octogenarian author published her tenth novel this year.

Thesaurus

Synonyms
1 noun · a person between 80 and 89... eightysomething
2 adj · being between 80 and 89... octogenary
Word family
Forms octogenarians

Etymology

From Latin octōgēnārius + -an (suffix forming adjectives and representative nouns), either directly or via French octogénaire, from Latin octōgēnus (“80 each”) + -ārius (“-ary”), from octōgintā (“eight tens, 80”).

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