tweenage en · ADJ
Etymology
From between and teenage.
Meanings
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(not-comparable) Not yet a teenager (being less than thirteen years old), but starting to act like one.
What began as a mere made-for-television movie (on the Disney Channel, yet) has grown quickly into an international phenomenon both commercial and spiritual, at least for tweenage youngsters (mostly girls).
2007 August 11, Charles Isherwood, “A Prayerful Three-Pointer From the Orchestra Pit”, in New York Times: