four-party

[Haroldvof]

involving four parties

[MiguelANymn]

A four-party system or situation refers to an arrangement, negotiation or system in which four distinct groups, entities or individuals are involved, each representing their own interests. This term is often used in the context of political systems where there are four major political parties, but can also be used in other contexts such as business or legal negotiations where four main parties are involved.