[muhl-ti-lat-er-uh l] /ˌmʌl tɪˈlæt ər əl/

having several or many sides; many-sided.
participated in by more than two nations, parties, etc.; multipartite:
multilateral agreements on disarmament.
/ˌmʌltɪˈlætərəl; -ˈlætrəl/
of or involving more than two nations or parties: a multilateral pact
having many sides

1928, from multilateral + -ism.

also multi-lateral, 1690s, in geometry, “having many sides,” from multi- + Latin latus (genitive lateris) “side” (see oblate (n.)). Figurative use by 1748. Meaning “pertaining to three or more countries” is from 1802. Related: Multilaterally.
multilateralism [(mul-tee-lat-uhr-uh-liz-uhm)]

Trade or diplomatic negotiations among several nations. (See diplomacy and recognition; compare bilateralism and unilateralism.)


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