Definition of moderantism in US English:

moderantism

noun

historical
  • The doctrines and spirit of the moderate republican party during and after the French Revolution.

Origin

Late 18th century. From French modérantisme from modérant, present participle of modérer to moderate + -isme.

Pronunciation

moderantism

/ˈmɒd(ə)rəntɪz(ə)m/