thirtysomething

adjective

thir·​ty·​some·​thing ˈthər-tē-ˌsəm(p)-thiŋ 

: having an age of 30 to 39 years old

thirtysomething parents

also : of or relating to people in their thirties

Just the usual thirtysomething decor—Persian rug, book-shelves, abstract paintings, glass coffee table, … and a few exotic trinkets picked up on foreign junkets.

—Marly Swick

thirtysomething noun

Examples of thirtysomething in a Sentence

Recent Examples on the Web

Mary, our thirtysomething narrator, has recently boomeranged back to her hometown (York) after experiencing a break with reality that may or may not be psychotic. — Emily Temple, Literary Hub, 26 May 2026

Outerlands stars Dillon as thirtysomething Cass, who hustles jobs as a server, nanny and party drug dealer to make rent on their tiny San Francisco apartment. — Glenn Garner, Deadline, 31 Oct. 2025

In 2017, Matthew Williams, a thirtysomething software engineer with an athletic build and a bald head, went for a long bike ride in the hills of San Francisco. — Dhruv Khullar, New Yorker, 22 Sep. 2025

Like another thirtysomething pavement-pounder of yore, New York’s own Walt Whitman, Zohran Mamdani popped up nearby and unexpectedly. — Dan Chiasson, The New York Review of Books, 6 Nov. 2025

Word History

First Known Use

1987, in the meaning defined above

Rhymes for thirtysomething

• something