From French octogénaire (from Latin octōgēnārius (containing eighty), from octōgintā (eighty)) + -ian.


octogenarian (not comparable)

  1. being between the age of 80 and 89, inclusive
    Coordinate terms: vicenarian, tricenarian, quadragenarian, quinquagenarian, hexagenerian, sexagenarian, septuagenarian, nonagenarian, centenarian
  2. of or relating to an octogenarian



octogenarian (plural octogenarians)

  1. One who is between the age of eighty and eighty-nine, inclusive.
    • 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.
    • 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.


Coordinate termsEdit