A person whose age is between forty and forty-nine years, inclusive; someone in his or her forties.(noun)
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Use "fortysomething" in a sentence
"Leno asked the 17-year-old actor for his most bizarre fan encounter, and though Lautner admitted it was hard to just choose one, he picked a winner: He recalled a fortysomething mother and her teenage daughter in line at a US autograph signing."
""I wouldn't say we felt satisfied, but it was over," recalls a fortysomething property developer."
"The fortysomething has been a recovering sex addict for 12 years and is one of 12 million Americans who struggle with it, according to the American Association for Marriage and Family Therapists."