young adult
US /ˌjʌŋ ˈæd.ʌlt/
UK /ˌjʌŋ ˈæd.ʌlt/

1.
adulto joven, jóvenes adultos
a person who is no longer a child but not yet fully adult, typically between the ages of 18 and 25
:
•
The workshop is designed for young adults interested in technology.
El taller está diseñado para adultos jóvenes interesados en tecnología.
•
Many young adults are still living with their parents.
Muchos adultos jóvenes todavía viven con sus padres.