me·​di·​a·​tor | \ ˈmē-dē-ˌā-tər How to pronounce mediator (audio) \

Definition of mediator

1 : one that mediates especially : one that mediates between parties at variance
2 : a mediating agent in a physical, chemical, or biological process

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Examples of mediator in a Sentence

if you two cannot resolve this argument on your own, we'll have to bring in a mediator
Recent Examples on the Web The union’s most recent one-year contract ended June 30, with nearly 60 hours of negotiations taking place from June 11 through Aug. 19, including the use of a federal mediator beginning in July 2020. Thomas Jewell, cleveland, "Cleveland Heights-University Heights teachers union declines ‘last, best, final’ contract offer, with more talks set," 13 Oct. 2020 But declarations by Turkey, which is already involved in two proxy conflicts with Russia—in Syria and Libya—are complicating Russia’s efforts to remain neutral and cast itself as a mediator. WSJ, "Armenia-Azerbaijan Conflict: Why Are They Fighting in Nagorno-Karabakh?," 13 Oct. 2020 In an indication of how Russia could serve as a powerful mediator, both Pashinyan and Azerbaijani President Ilham Aliyev granted interviews to Russian state television in late September. Washington Post, "Why Nagorno-Karabakh has pitted Armenia and Azerbaijan for decades," 2 Oct. 2020 Lebanese House Speaker Nabih Berri is scheduled to present later Thursday a framework for talks that will be held under the auspices of the United Nations with the U.S. acting as a mediator, Al-Akhbar newspaper said. Dana Khraiche,, "Lebanon, Israel Reportedly to Begin Indirect Talks on Border Issues," 1 Oct. 2020 Karabakh is distinct from the others for the depth of the ethnic enmity between the sides and because Russia has played a role as a mediator more than instigator. Andrew E. Kramer, New York Times, "Fighting Flares Between Azerbaijan and Armenia," 27 Sep. 2020 Moscow, in contrast, has remained studiously neutral over the long-running conflict and has anointed itself mediator. David Gauthier-villars, WSJ, "Turkey’s Foray Into Armenia-Azerbaijan Conflict Tests Russia’s Influence," 2 Oct. 2020 Russia has remained the most active international player in the conflict, and the main mediator. NBC News, "Nagorno-Karabakh: What's behind the fighting between Armenia and Azerbaijan?," 30 Sep. 2020 But assuming that there is more to the story, a good mediator might help these two (without the ex’s mom) quell the flames better than another lawyer. cleveland, "Dear Annie: Readers weigh in on parental rights," 21 Sep. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mediator.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of mediator

14th century, in the meaning defined at sense 1

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Time Traveler for mediator

Time Traveler

The first known use of mediator was in the 14th century

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Last Updated

18 Oct 2020

Cite this Entry

“Mediator.” Dictionary, Merriam-Webster, Accessed 24 Oct. 2020.

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More Definitions for mediator


me·​di·​a·​tor | \ ˈmēd-ē-ˌāt-ər How to pronounce mediator (audio) \

Medical Definition of mediator

: one that mediates especially : a mediating agent (as an enzyme or hormone) in a chemical or biological process substance P, a neuropeptide mediator of analgesic stimuli in peripheral sensory nerves — D. R. Robinson


me·​di·​a·​tor | \ ˈmē-dē-ˌā-tər How to pronounce mediator (audio) \

Legal Definition of mediator

: one that works to effect reconciliation, settlement, or compromise between parties at variance — compare arbitrator

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