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Definition of Octogenarian
1. Noun. Someone whose age is in the eighties. 
2. Adjective. Being from 80 to 89 years old.
Similar to: Old
Definition of Octogenarian
1. n. A person eighty years, or more, of age.
Definition of Octogenarian
1. [n -S]
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1. Noun. Someone whose age is in the eighties. 
1. n. A person eighty years, or more, of age.
1. [n -S]