Beethoven (ba'-to-ven), Ludwig van. Eminent German composer. Born at Bonn in 1770. He studied under Hayden. His numerous symphonies, of which the finest are the "Battle Symphony," and the "Pastoral Symphony;" his operas, of which "Fidelio" is the most admired; and his other works, abounding in originality and genius, have given him lasting fame. Died 1827.