preteen

noun
UK /ˌpriːˈtiːn/
US /ˌpriːˈtiːn/

A preteen is a kid who is almost a teenager, usually between nine and twelve years old.

My cousin is a preteen who loves riding her bike and reading comics.


OTHER MEANINGS

2. Happening or existing just before the teenage years.

She joined a preteen reading club at the library.

3. A child in the stage just before adolescence.

The camp has special activities for preteens.

4. Relating to the years just before age thirteen.

He is going through a preteen growth spurt.