Definition of "crossfade"

(music) A fade in which the volume of one audio track is lowered as that of another is raised.  examples

(film, television) A fade in which the picture of one video track is diminished as that of another is brightened.  examples

(music, transitive, intransitive) To lower the volume of one audio track while raising that of another, so that they blend together.  examples

(film, television, transitive, intransitive) To diminish the picture of one video track while raising that of another, so that they blend together.  examples

(slang, transitive, intransitive) To be under the influence of multiple psychoactive substances at the same time; most typically marijuana and alcohol.