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 But Russia’s ability to influence events in the Caucasus now appears limited, despite its past role as a mediator in the Nagorno-Karabakh conflict. Anton Troianovski, New York Times, "Putin, Long the Sower of Instability, Is Now Surrounded by It," 7 Oct. 2020 The emir was also the go-to mediator in regional disputes, most recently between Saudi Arabia, its allies, and Qatar. Barnini Chakraborty, Fox News, "Kuwait's Emir Sheikh Al Ahmed Al Sabah dies at 91, half brother to take over duties," 29 Sep. 2020 Hall said he's served for the past seven years as a mediator in family court. John Simerman,, "Four vie for Division 'I' seat in Orleans Parish Civil District Court," 28 Sep. 2020 As a neutral family mediator in the age of COVID-19, Price has experienced firsthand multiplying stressors on single parents and co-parenting families. Reid Forgrave, Star Tribune, "New Hope co-parenting coach helps divorced moms and dads put kids first," 18 Sep. 2020 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

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

30 Oct 2020

Cite this Entry

“Mediator.” Dictionary, Merriam-Webster, Accessed 31 Oct. 2020.

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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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