Definition of coalitionism in English:

coalitionism

Pronunciation /ˌkəʊəˈlɪʃ(ə)nɪz(ə)m/ /ˌkəʊəˈlɪʃənɪz(ə)m/

noun

  • Government by coalition; the principles or advocacy of this.

Origin

Mid 19th century; earliest use found in Vermont Watchman & State Journal. From coalition + -ism.