Meaning of the word septuagenarian in English

What does septuagenarian mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

septuagenarian

US /ˌsep.tu.ə.dʒəˈner.i.ən/
UK /ˌsep.tʃu.ə.dʒɪˈneə.ri.ən/

Noun