tweenage

adjective
UK /ˈtwiːneɪdʒ/
US /ˈtwiːneɪdʒ/

Being the age between a child and a teenager, usually about 9 to 12 years old.

She is in her tweenage years and loves pop music and sleepovers.


OTHER MEANINGS

2. Suitable for or typical of children around 9 to 12 years old.

The store sells tweenage clothing and accessories.

3. The period of life when someone is a tween.

During her tweenage, she started babysitting younger kids.

4. Behaving in a way that is not quite childish but not yet teenage.

His tweenage jokes made the whole family laugh.