Meaning of septuagenary

sep•tu•ag•e•nar•y

Pronunciation: (sep"ch-aj'u-ner"ē, -t-, -ty- or, esp. Brit., -ch-u-jē'nu-rē), [key]
— pl. -nar•ies.
  1. septuagenarian.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.