Adjective octogenarian has 1 sense
  1. octogenarian - being from 80 to 89 years old
    Antonyms:
    young, immature (indirect, via old)
,Noun octogenarian has 1 sense
  1. octogenarian - someone whose age is in the eighties
    --1 is a kind of
    oldster, old person, senior citizen, golden ager
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