Definition of neo-Christianism in US English:

neo-Christianism

noun

rare
  • A modern or new form of Christianity.

Origin

Late 19th century; earliest use found in John Seeley (1834–1895), historian. From neo-Christian + -ism. Compare French néo-christianisme.

Pronunciation

neo-Christianism

/ˌniːə(ʊ)ˈkrɪstʃənɪz(ə)m/