Definition of aleatorism in English:

aleatorism

noun

Music
  • Dependence on chance in the composition and performance of music.

Origin

1960s; earliest use found in The Listener. From classical Latin aleatorius aleatory + -ism.

Pronunciation

aleatorism

/ˌeɪlɪəˈtɒrɪz(ə)m//ˌalɪəˈtɒrɪz(ə)m/