Definition of "Adolescent" :

noun: a juvenile between the onset of puberty and maturity

adjective: in the state of development between puberty and maturity

"Adolescent boys and girls."

adjective: displaying or suggesting a lack of maturity

"Adolescent insecurity."

adjective: being of the age 13 through 19

adjective: relating to or peculiar to or suggestive of an adolescent

"Adolescent problems."