noun
the time of life between 30 and 40
• Syn: ↑thirties, ↑mid-thirties
• Hypernyms: ↑time of life
* * *
thirty-something (forty-something, etc.)
I'm guessing she's forty-something
■ of or relating to a person between thirty and forty (forty and fifty, etc.)
this music appeals more to your thirty-something crowd
Useful english dictionary. 2012.