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1. Background music; Background sound
Noun
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1. Background music; Background sound
1. It was not background music.
1. Background music; Ambient sound
1. Background music was.
1. If background sound; If there is background sound
1. Probably background music.
1. It is not background music.; It isn't background sound.
1. sound
1. background (of a scene, picture, etc.)
2. background (of an event, person, etc.); circumstances
+ 2 additional meanings1. soundtrack