septuagenarian

adjective

1. of the age of 70 years or between 70 and 80 years old.

noun

2. a septuagenarian person.

noun

1. a person who is from 70 to 79 years old

adjective

2. being between 70 and 79 years old
3. of or relating to a septuagenarian

adj.“of age 70, seventy-year-old,” 1793, from Latin septuagenarius “containing seventy,” from septuageni “seventy each,” related to septuaginta “seventy” (see Septuagint). Noun meaning “a 70-year-old person” first recorded 1805. As an adjective, septuagenary is recorded from c.1600.