mu·sic /ˈmyo͞ozik/ vocal or instrumental sounds (or both) combined in such a way as to produce beauty of form, harmony, and expression of emotion. "couples were dancing to the music" the art or science of composing or performing music. noun: music "he devoted his life to music" a sound perceived as pleasingly harmonious. "the background music of softly lapping water. the written or printed signs representing vocal or instrumental sound.