mediator

noun

me·​di·​a·​tor ˈmē-dē-ˌā-tər How to pronounce mediator (audio)
1
: one that mediates
especially : one that mediates between parties at variance
2
: a mediating agent in a physical, chemical, or biological process

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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The student played a leading role in last year’s campus protests about the rising death toll in Gaza in Israel’s war against Hamas and the university’s investment ties to Israel, acting as a mediator between Columbia administrators and student protesters. Molly Crane-Newman, New York Daily News, 24 Apr. 2025 Hermosillo works out of the agency’s Los Angeles office in Glendale, staffed by five mediators and a supervisor. Los Angeles Times, Chicago Tribune, 22 Apr. 2025 Berri served as the mediator between Hezbollah and the US in talks last year to reach a ceasefire with Israel. Nadeen Ebrahim, CNN Money, 16 Apr. 2025 Earlier Tuesday, officials involved in mediating Gaza ceasefire talks had expressed optimism that a deal could be reached within weeks, Egyptian mediators told NPR. Aya Batrawy, NPR, 15 Apr. 2025 See All Example Sentences for mediator

Word History

First Known Use

14th century, in the meaning defined at sense 1

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

Browse Nearby Words

Cite this Entry

“Mediator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mediator. Accessed 29 Apr. 2025.

Kids Definition

mediator

noun
me·​di·​a·​tor ˈmēd-ē-ˌāt-ər How to pronounce mediator (audio)
: one that mediates
mediatory
-ē-ə-ˌtōr-ē
-ˌtȯr-
adjective

Medical Definition

mediator

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

Legal Definition

mediator

noun
me·​di·​a·​tor ˈmē-dē-ˌā-tər How to pronounce mediator (audio)
: one that works to effect reconciliation, settlement, or compromise between parties at variance compare arbitrator

More from Merriam-Webster on mediator

Last Updated: - Updated example sentences
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