adolescent
nounUK /ˌædəˈlesənt/
US /ˌædəˈlesənt/
A young person who is growing up and is between being a child and an adult.
The adolescent spent most of his free time playing video games with friends.
OTHER MEANINGS
2. Relating to the period of life between childhood and adulthood.
She went through many adolescent changes during middle school.
3. Immature or not fully developed in behavior.
His adolescent sense of humor made the adults roll their eyes.
4. A person in the process of developing from a child into an adult.
The clinic offers special health services for adolescents.