Definition of mediator noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈmiːdieɪtə(r)//
; NAmE NAmE//ˈmiːdieɪtər//
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a person or an organization that tries to get agreement between people or groups who disagree with each other to act as (a) mediator in the negotiations A Swedish diplomat acted as mediator between the government and the rebels. The peace talks were chaired by international mediators.
See the Oxford Advanced American Dictionary entry: mediator