Noun
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a juvenile between the onset of puberty and maturity
Adjective
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in the state of development between puberty and maturity
"adolescent boys and girls"
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displaying or suggesting a lack of maturity
"adolescent insecurity"
"jejune responses to our problems"
"their behavior was juvenile"
"puerile jokes"
-
being of the age 13 through 19
"teenage mothers"
"the teen years"
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relating to or peculiar to or suggestive of an adolescent
"adolescent problems"