Definition of "aged"

John Mathews, aged about 18, stood at the bar with his hands in his pockets, alike indifferent to a verdict of acquittal or guilty.

1865 October 6, “Court of Special Sessions”, in The New York Times

Forty-six percent of drivers aged 18 to 24 said they would choose Internet access over owning a car, according to the research firm Gartner.

2012 March 22, Amy Chozick, “As Young Lose Interest in Cars, G.M. Turns to MTV for Help”, in The New York Times