thir ‧ ty ‧ some ‧ thing /ˈθɜːtiˌsʌmθɪŋ $ ˈθɜːr-/ BrE AmE noun [countable]
informal someone between the age of 30 and 39:
a new magazine aimed at thirtysomethings
—thirtysomething adjective :
a thirtysomething lawyer
thir ‧ ty ‧ some ‧ thing /ˈθɜːtiˌsʌmθɪŋ $ ˈθɜːr-/ BrE AmE noun [countable]
informal someone between the age of 30 and 39:
a new magazine aimed at thirtysomethings
—thirtysomething adjective :
a thirtysomething lawyer
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012