postteen
adjective
post·teen ˌpōst-ˈtēn 
: occurring after one is no longer a teenager
In this chapter, I define youth broadly as that period in an individual's life between childhood and adulthood. This period may include preteen, teen, and some postteen years.
Collins O. Airhihenbuwa
Collins O. Airhihenbuwa
Word History
First Known Use
1938, in the meaning defined above