art music definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
that form of music in a culture, as European classical music, having an established theoretical basis handed down by rote or through notation, a traditional repertoire, and a high standard of performance, usually by professional musicians
art music definition by American Heritage Dictionary
Music composed in a classical tradition and intended as serious art, especially as distinguished from popular or folk music.