Definition of multi-partyism in English:

multi-partyism

noun

Politics
  • A political system in which elections are contested by three or more major parties; advocacy of such a system.

Origin

Early 20th century; earliest use found in Sandusky (Ohio) Star Journal. From multi-party + -ism.

Pronunciation

multi-partyism

/ˌmʌltɪˈpɑːtɪɪz(ə)m/