transition

In music, a passage connecting two sections of a piece. For example, in a sonata-form movement a transition often connects the first and second subjects (principal melodies). The retransition is the transition connecting the development and the recapitulation. Transition is also an alternative name for modulation, especially if the change of keys is abrupt.

transition

In computing, way in which one image changes to another in a slide show, animation, or multimedia presentation.

Different transitions have a different effect on the viewer: slow mixes (fades) are gentler on the eye than sudden blackouts, and wipes – in which one scene replaces the next like a blind being pulled across the screen – are an especially dynamic type of transition.