Short stand for "Original Sound Track".
-Recorded music accompanying and synchronized to the images of a motion picture,
television program or video
game
-A commercially released soundtrack album of music as featured in the soundtrack of a film or TV show
-The physical area of a film that contains the synchronized recorded sound.
Guy1:
hey Guy2 i just got the OST "The Eye of the
Tiger" from the movie Rocky III to my iPod.
Guy2:
cool Guy1, let me listen to it.