From Wiktionary, the free dictionary
From poly- + lateral.
polylateral (not comparable)
- (diplomacy) involving multiple parties, including nonstate actors
- Synonym: plurilateral
2019, Yolanda Kemp Spies, Global South Perspectives on Diplomacy[1], →ISBN, page 189:Polylateral ventures with the media can allow foreign ministries to professionalise their public diplomacy.
