Definition of multilateralist in English:

multilateralist

noun

  • A person who advocates or supports the principle of participation by three or more parties, especially by the governments of different countries.

    ‘he is a committed multilateralist’

adjective

  • Relating to or supporting the principle of participation by three or more parties.

    ‘a multilateralist foreign policy’

Pronunciation

multilateralist

/ˌmʌltɪˈlat(ə)r(ə)lɪst/