Home›Browse›S›sidemansidemanOur editors are putting together more complete content — check back in about 20 minutessidemansideman — nounnoun1. a musician who is not the leader or a main member of a band, often a session pla1.nounDefinitiona musician who is not the leader or a main member of a band, often a session playerExampleHe worked as a sideman for many famous jazz artists.