me·​di·​a·​tor | \ ˈmē-dē-ˌā-tər \

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

On the last day, the remaining fighters were thrown a farewell dinner at the farm of one of the mediators. Maggie Michael, Fox News, "Details of deals between US-backed coalition, Yemen al-Qaida," 6 Aug. 2018 Another avenue is hiring a more affordable, by-the-hour mediator like Miraglia, who mediates a conversation and drafts a contract based on a couple’s goals. Hannah Hickok, Glamour, "I Got a Prenup—but It Wasn't to Protect My Money," 27 Nov. 2018 Shaping the narrative Savall is a respected artistic mediator of intercultural dialogue. Thomas May, The Seattle Times, "‘The Routes of Slavery’ traces a musical journey of resilience in the face of inhumanity," 31 Oct. 2018 Vucic has met with the EU's foreign policy chief Federica Mogherini, who is the mediator in the talks that are aimed at finding a solution to the dispute stemming from the 1990s conflict. Fox News, "The Latest: EU says no breakthrough in Serbia, Kosovo talks," 7 Sep. 2018 The French president has tried to carve out a role for himself as a mediator in the Middle East and a proponent of multilateral agreements. Alissa J. Rubin, New York Times, "Libyan Factions Agree to Elections Despite Deep Divisions," 29 May 2018 Though models differ, all reject the involvement of the criminal-justice system, choosing instead to rely on community support networks and mediators. Kim Tran, Teen Vogue, "Transformative Justice, Explained," 15 Nov. 2018 His account was confirmed by the mediator and two Yemeni government officials. Maggie Michael, Fox News, "'Unite with the devil': Yemen war binds US, allies, al-Qaida," 7 Aug. 2018 Moon’s role as a mediator came into sharp focus in the past week, after President Trump canceled the summit in a letter to North Korean leader Kim Jong Un. Michelle Ye Hee Lee, Washington Post, "South Korea’s President Moon is the man in the (very precarious) middle," 28 May 2018

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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Last Updated

24 Jan 2019

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

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More Definitions for mediator


me·​di·​a·​tor | \ ˈmēd-ē-ˌāt-ər \

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 \

Legal Definition of mediator

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

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More from Merriam-Webster on mediator

Rhyming Dictionary: Words that rhyme with mediator

Thesaurus: All synonyms and antonyms for mediator

Spanish Central: Translation of mediator

Nglish: Translation of mediator for Spanish Speakers

Britannica English: Translation of mediator for Arabic Speakers

Comments on mediator

What made you want to look up mediator? Please tell us where you read or heard it (including the quote, if possible).


to settle judicially or to act as judge

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