Definition of Marcionism in English:

Marcionism

noun

Church History
  • The doctrines of the Marcionites.

Origin

Mid 19th century. From the name of Marcion + -ism. Compare French Marcionisme, and earlier Marcionist.

Pronunciation

Marcionism

/ˈmɑːsɪənɪz(ə)m//ˈmɑːʃ(ɪ)ənɪz(ə)m/