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.
If the two primary belligerents—Russia and Ukraine—are unwilling to stop fighting, and if both remain wary of postwar cease-fire security guarantees, China will not succeed as a third-party mediator. Da Wei, Foreign Affairs, 29 July 2025 This may not be necessary if both parties are willing to work together with a mediator. Kelly Stiefel Arias, Kansas City Star, 23 July 2025 It will be birthed by educators and engineers, by mothers and mediators, by those brave enough to imagine a future beyond vengeance. Margaux Chetrit, Sun Sentinel, 23 July 2025 One official with knowledge of the negotiations said the mediators are increasingly optimistic that a deal can be reached after several major sticking points to an agreement were resolved last week. Catherine Nicholls, CNN Money, 21 July 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 2 Aug. 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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