Definition of millennianism in US English:

millennianism

(also millenianism)

noun

  • Millenarianism.

Origin

Late 17th century; earliest use found in Anthony Wood (1632–1695), antiquary. From post-classical Latin millennium millennium + -ian + -ism. In later examples, perhaps re-formed from millennian + -ism.

Pronunciation

millennianism

/mɪˈlɛnɪənɪz(ə)m/