adolescent

(noun) a juvenile between the onset of puberty and maturity. Synonyms: stripling, teenager, teen.

(adj) relating to or peculiar to or suggestive of an adolescent. Examples: "Adolescent problems."

(adj) being of the age 13 through 19. Synonyms: teen, teenage, teenaged. Examples: "Teenage mothers." "The teen years."

(adj) displaying or suggesting a lack of maturity. Synonyms: jejune, juvenile, puerile. Examples: "Adolescent insecurity." "Jejune responses to our problems." "Their behavior was juvenile." "Puerile jokes."

(adj) in the state of development between puberty and maturity. Examples: "Adolescent boys and girls."