Definition of monadist in US English:

monadist

noun

Philosophy
  • A follower or adherent of monadism.

adjective

Philosophy
  • Of or relating to monadism.

Origin

Late 18th century; earliest use found in Henry Hunter (1741–1802), Church of Scotland minister and translator. From monad + -ist, after French monadiste, noun and adjective. Compare also German Monadist, noun.