Of, relating to, or applicable to those aged 13 through 19.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "teenage" in a sentence
"Not just for the phrase "teenage nudist" but for the word "daughter"."
"I believe that 'teenage' is the product of over-extended schooling and that some people really need to be in the world of work by the age of 14 (the government now wants people to stay on until 18!) they would be more fulfilled and behave better in the community for it too."
"If the lame brain teenage dropout that fathered her grandchild would just go away it would be so nice."