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English definition of “teenager”

teenager

noun [C]    /ˈtinˌeɪ·dʒər/ (short form teen,  /tin/)
a person who is 13 through 19 years old teenage    /ˈtinˌeɪdʒ/ adjective [not gradable] (also teenaged,  /ˈtinˌeɪdʒd/, short form teen,  /tin/) They have two teenage sons.
(Definition of teenager noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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