progressive rock

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A rock music genre originating from the late 1960s and early 1970s, heavily influenced by classical music and jazz

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a style of rock music that emerged in the 1970s; associated with attempts to combine rock with jazz and other forms; intended for listening and not dancing