thirtysomething adjective 1noun 1number 1forms 1 adjective1 •Between 30 and 39 years of age. noun1 •A tricenarian: a person in their thirties, a person aged between 30 and 39 years (inclusive). number1 •Between 30 and 39.At this point, page thirtysomething, I gave up on real people and began concentrating on Mr. Patterson's other people. — 1993 formsthirtysomethings
