tween
noun /twiːn/
  /twiːn/
 (also tweenager 
 (informal) /ˈtwiːneɪdʒə(r)/
  /ˈtwiːneɪdʒər/
, especially British English tweener  /ˈtwiːnə(r)/
  /ˈtwiːnər/
)- a child between the ages of about 10 and 12 synonym pre-teenTopics Life stagesc2Word Origin1940s: of unknown origin.