octogenarian
Definitions
A person who is between 80 and 89 years old.
Relating to or characteristic of a person in their eighties.
Examples
The octogenarian surprised everyone by completing his first marathon at the age of eighty-two.
Despite being an octogenarian, she remains the most active member of the local gardening club.
The documentary profiles an octogenarian who has spent his entire life documenting the history of his small village.
Synonyms
elderly person senior citizen pensioner old-timer octogenary