Search Result for "octogenarian": 
Wordnet 3.0

NOUN (1)

1. someone whose age is in the eighties;


ADJECTIVE (1)

1. being from 80 to 89 years old; 



The Collaborative International Dictionary of English v.0.48:

Octogenarian \Oc`to*ge*na"ri*an\, n.
   A person eighty years, or more, of age.
   [1913 Webster]


WordNet (r) 3.0 (2006):

octogenarian
    adj 1: being from 80 to 89 years old
    n 1: someone whose age is in the eighties