any of various styles of jazz that have evolved since the early 1940s and are marked generally by harmonic and rhythmic complexity, emphasis on chord progressions rather than melody, a tendency to draw on classical forms and styles, and eclectic, allusive melodic tags in improvisation.Also called progressive jazz.Compare bop1, cool jazz, hard bop.
Origin of modern jazz
First recorded in 1950–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
any of the styles of jazz that evolved between the early 1940s and the later emergence of avant-garde jazz, characterized by a greater harmonic and rhythmic complexity than hitherto
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012