Definition of submissionist in English:

submissionist

noun

depreciative, historical
  • A person who advocates submission or compromise; specifically (US History, in the period preceding the American Civil War) a person from the Southern states willing to relinquish sovereignty in order to remain in the Union.

Origin

Early 19th century; earliest use found in The New Monthly Magazine. From submission + -ist.

Pronunciation

submissionist

/səbˈmɪʃnɪst/