(Greek mythology) The Muse of epic poetry.
In Greek mythology, the Muse of epic poetry, and so the most important of all the Muses.

ETYM Latin Calliope, Greek Kallioph, lit, the beautiful-voiced; pref. kalli- (from kalos beautiful) + ops, opos, voice.
A musical instrument consisting of a series of steam whistles played from a keyboard; SYN. steam organ.