septuagenary UK /ˌsɛptjʊəˈdʒiːnri/US /ˌsɛpt͡ʃəd͡ʒɛnəri/adjective 2noun 1forms 1 adjective2 •(no longer used) Of or related to the number seventy. •(no longer used) Synonym of septuagenarian: lasting or aged seventy years; seventy-year-old. noun1 •(no longer used) Synonym of septuagenarian: a seventy-year-old. formsseptuagenaries
