intergovernmental
adj.adj. involving or happening between the governments of two or more different countries.
adj. relating to or conducted between two or more governments. Typically describes formal agreements, organisations, or communication channels where national authorities represent their respective states.
The two countries signed an intergovernmental agreement on trade.
The intergovernmental panel met in Brussels to discuss new environmental regulations that would affect the entire continent.
Effective climate action requires a high degree of intergovernmental cooperation, as individual nations cannot solve global atmospheric issues without binding agreements and shared resources.
Typically used attributively before a noun; rarely used predicatively after a linking verb.