multilateral

mul·ti·lat·er·al

adjective \ˌməl-tē-ˈla-t(ə-)rəl, -ˌtī-\

: involving more than two groups or countires

Full Definition of MULTILATERAL

1

:  having many sides

2

:  involving or participated in by more than two nations or parties <multilateral agreements>

— mul·ti·lat·er·al·ism \-ˈla-t(É™-)rÉ™-ËŒli-zÉ™m\ noun

— mul·ti·lat·er·al·ist \-list\ noun

— mul·ti·lat·er·al·ly adverb

Yes, "irregardless" is a word. No, that
doesn't mean you should use it. »

First Known Use of MULTILATERAL

circa 1696