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fade-inor fade·in (fād′ĭn′)
A gradual appearance of an image, light, or sound, especially as a transition in a cinematic work, audio recording, or performance.
1. (Film) films an optical effect in which a shot appears gradually out of darkness
2. (Telecommunications) a gradual increase in the volume in a radio or television broadcast
(Telecommunications) Also: fade up to increase or cause to increase gradually, as vision or sound in a film or broadcast
1. a gradual increase in the visibility of a film or television scene.
2. a gradual increase in the volume of broadcast or recorded sound.