noun which may take the genitive case particle 'no'
Used in political, economic, or diplomatic contexts to describe agreements, negotiations, or relations involving multiple countries.
多国間の貿易協定が結ばれた。
A multilateral trade agreement was concluded.
多国間協議で環境問題が話し合われた。
Environmental issues were discussed at the multinational talks.
A broader term meaning 'international', not limited to formal agreements or specific numbers of countries.
Compound of 多 (many), 国 (country), and 間 (between/among). The reading is standard on'yomi.