Charles Ives
 /ˌtʃɑːlz ˈaɪvz/
  /ˌtʃɑːrlz ˈaɪvz/
- (1874-1954) a US composer of modern classical music. His work introduced many new musical ideas but was not much played during his life. One of his best-known pieces is the Concord Piano Sonata (1915).