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

1.
jeune adulte, jeunes adultes
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.
L'atelier est conçu pour les jeunes adultes intéressés par la technologie.
•
Many young adults are still living with their parents.
De nombreux jeunes adultes vivent encore chez leurs parents.