1.NounA person who has achieved the age of majority but whose character and personality are still developing as they gain experience.
"Young adult actress Annie Jay wrote a book called Stars in Your Eyes, Feet on the Ground giving career advice for young adult actors."
2.NounAn adolescent; a genre of writing aimed primarily at this readership.
"My favorite young adult writer, Jen Derbyshire, just published her 50th paperback novel, the latest in an adventure series spanning fifteen years.; Emily said to shelve these books in Young Adult and to make a table display with some of them."