1. [informal] A child approaching or in early teenage years
   "Marketing campaigns often target tweenies with age-appropriate products";
   - tweenie [informal], tweenager [informal]
    
2. [archaic] A junior maid who assisted both the cook and the housemaid in large households
   "The tweeny's duties often included cleaning and helping in the kitchen";
   - between-maid [archaic]

Derived forms: tweenies

Encyclopedia: Tweeny