Definitions for "Tweening"
A contraction of "in-betweening", which is the generating of intermediate frames between two images giving the impression that the first image blends smoothly into the second. Tweening is important to the (computer) animation process.
The creation of a series of transition frames between two key frames or reference images.
Also known as in-betweening; calculating the intermediate frames between two keyframes to simulate smooth motion.
Placing between or interpolating the area between pixels.