Meaning of quinquagenarian in English:

quinquagenarian

Pronunciation /ˌkwɪŋkwədʒɪˈnɛːrɪən/

noun

  • A person who is between 50 and 59 years old.

Origin

Mid 16th century (denoting a soldier or leader commanding fifty men): from Latin quinquagenarius (based on quinquaginti ‘fifty’) + -an. The sense ‘person aged between 50 and 59’ dates from the mid 19th century.