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



octogenarian (plural octogenarians)

  1. Synonym of eightysomething: a person between 80 and 89 years old.
    • 1929, Robert Dean Frisbee, The Book of Puka-Puka (republished by Eland, 2019; p. 75f; emphasis in original):
      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.
    • 1941 October, “Notes and News: Finsbury Park Station”, in Railway Magazine, page 466:
      Finsbury Park station, one of the most important L.N.E.R. suburban junctions, is now an octogenarian.
    • 1951, IBM Corp., Proceedings, Computation Seminar, page 13:
      To replace logarithmic tables with natural tables required some time. This seems like a modern age, yet I am not an octogenarian and I can remember the dying gasp of the logarithmic table as the standard method of computation. I have seen the desk calculator become a necessary instrument for every scientist who is doing quantitative work.


octogenarian (not comparable)

  1. Of or related to eightysomethings.
    Coordinate terms: vicenarian, tricenarian, quadragenarian, quinquagenarian, semicentenarian, hexagenarian, sexagenarian, septuagenarian, nonagenarian, centenarian, semisupercentenarian, supercentenarian