eightysomething noun 1number 1forms 1 noun1 •(informal) A person between 80 and 89 years old.She was a sprightly eightysomething. number1 •(informal) An indeterminate value between 80 (inclusive) and 90 (exclusive).There in the doorway stood an eightysomething Las Vegas showgirl. — 2006 formseightysomethings
