(1813–83), German composer; full name Wilhelm Richard Wagner. He developed an operatic genre which he called music drama, synthesizing music, drama, verse, legend, and spectacle. Notable works: The Flying Dutchman (opera, 1841), Der Ring des Nibelungen (a cycle of four operas, 1847–74), Tristan and Isolde (music drama, 1859), and the Siegfried Idyll (1870).