Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun octogenarian

1 sense of octogenarian

Sense 1
octogenarian -- (someone whose age is in the eighties)
       => oldster, old person, senior citizen, golden ager -- (an elderly person)

Antonyms of adj octogenarian

1 sense of octogenarian

Sense 1
octogenarian -- (being from 80 to 89 years old)

INDIRECT (VIA old) -> young, immature -- ((used of living things especially persons) in an early period of life or development or growth; "young people")

Similarity of adj octogenarian

1 sense of octogenarian

Sense 1
octogenarian -- (being from 80 to 89 years old)
       => old (vs. young) -- ((used especially of persons) having lived for a relatively long time or attained a specific age; "his mother is very old"; "a ripe old age"; "how old are you?")