tween

Short definition from Wiktionary

Preposition

1. 1
   Alternative spelling of 'tween.

Noun

1. 1
   An action of tweening (inserting frames for continuity); a sequence of frames generated by tweening.
2. 2
   A child, especially a girl, in the age range between middle childhood and adolescence, normally between eight and thirteen years of age.
3. 3
   A number or age in the twenties (plural only), or a person of that age.

Verb

1. 1
   To generate intermediate frames in an animated sequence so as to give the appearance of smooth movement.

Adjective

1. 1
   Of or having to do with tweenagers.