Wolfgang Amadeus (ˈvɔlfɡaŋ amaˈdeːʊs). 1756–91, Austrian composer. A child prodigy and prolific genius, his works include operas, such as The Marriage of Figaro (1786), Don Giovanni (1787), and The Magic Flute (1791), symphonies, concertos for piano, violin, clarinet, and French horn, string quartets and quintets, sonatas, songs, and Masses, such as the unfinished Requiem (1791)