Home › Words › T › tweenagertweenager/ˈtwiːnˌeɪ.d͡ʒə(ɹ)/tweenager means A young person who is not yet a teenager (being less than thirteen years old), but starting to act like one: generally ten to twelve years old.tweenager is pronounced /ˈtwiːnˌeɪ.d͡ʒə(ɹ)/.EtymologyBlend of 'tween + teenager. Attested as early as the 1950s, but popularized in the late 20th or early 21st century.nounA young person who is not yet a teenager (being less than thirteen years old), but starting to act like one: generally ten to twelve years old.e.g.“Your eight to twelve year old is in the gray area between early childhood and the teen years. He is a child in the middle—a “tweenager.”” — 1994, Mary Manz Simon, How to Parent Your “Tweenager”, page 6:Definitions & examples from Wiktionary (CC BY-SA 3.0).