noun
multilateralism
Political principle of coordinating relations among three or more states, often contrasted with bilateralism or unilateralism.
多国間主義は国際協調の重要な原則だ。
Multilateralism is an important principle of international cooperation.
Compound of 多国間 (multinational, among many countries) and 主義 (principle, doctrine). The term is a direct translation of the English 'multilateralism' and is used primarily in political and diplomatic contexts.