fadeout

plural fadeouts · alternative fade-out

1. A gradual disappearance or fading away.

   The scene ends with a fadeout to unconsciousness.

   2009 February 17, Howard W. French, “Surviving a Hitch in an Army of Boys”, in New York Times

   1 more example

   Radio fadeouts in the arctic are caused by solar explosions and sunspot activity.

   1959, United States, Rescue and Survival Specialist, Department of the Air Force, pages 3–22