octogenarian

Meanings

1. 1
   noun

   Synonym of eightysomething: a person between 80 and 89 years old.

   Mama was by no means the only grandma present, for the octogenarians had turned out en masse from their huts and lean-tos and were paddling about, diving and splashing as unconcernedly as though they really belonged in the sea rather than on land.

2. 2
   adj

   being from 80 to 89 years old

3. 3
   noun

   someone whose age is in the eighties

4. 4
   adj

   Of or related to eightysomethings.

Etymology

From Latin octōgēnārius + -an (suffix forming adjectives and representative nouns), either directly or via French octogénaire, from Latin octōgēnus (“80 each”) + -ārius (“-ary”), from octōgintā (“eight tens, 80”).