Definition of octogenarian
: a person whose age is in the eighties The octogenarian uses a cane for walking.
Origin and Etymology of octogenarian
Latin octogenarius containing eighty, from octogeni eighty each, from octoginta eighty, from octo eight + -ginta (akin to viginti twenty) — more at vigesimal
First Known Use: 1815
OCTOGENARIAN Defined for English Language Learners
Definition of octogenarian for English Language Learners
: a person who is between 80 and 89 years old
Medical Definition of octogenarian
: a person whose age is in the eighties
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