Melanie, I use Garageband to make songs. And in the loops section texture is a subsection. Most of the loops/patches have words like: abstract, accents, ambient, atmosphere, and seem to have a connection to film scores, like mystery, suspense, and, strongly enough, sci-fi.
I think it's used in ambient music. Brian Eno is a good example and John Cage ore Cale or both? I don't recall. Maybe that helps?