mediator

noun

me·​di·​a·​tor ˈmē-dē-ˌā-tər 

1

: one that mediates

especially : one that mediates between parties at variance

2

: a mediating agent in a physical, chemical, or biological process

Synonyms

• broker
• buffer
• conciliator
• go-between
• honest broker
• interceder
• intercessor
• intermediary
• intermediate
• interposer
• middleman
• peacemaker

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

An eye on Gaza Longer term, Saudi Arabia may aim to use its role as a mediator in the meeting between Russia and the US to capitalize on a pressing regional matter – Trump’s controversial suggestion that the US take ownership of Gaza and permanently relocate its residents. —Mostafa Salem, CNN, 17 Feb. 2025

The rice serves as both a foundation and a mediator, bridging the creamy blandness of the pasta salad with the blunt-instrument intensity of the plate lunch’s third and central component, one kind or another of salty, savory meat. —Helen Rosner, The New Yorker, 16 Feb. 2025

The village is working with a mediator to come to terms on a contract covering the 12 employees and said in a statement Thursday it was surprised by the union’s notice of intent to strike. —Mike Nolan, Chicago Tribune, 13 Feb. 2025

Entertainment Tonight reported Tuesday that a mediator has been assigned to the case, which has a trial date set for March 9, 2026. —Jami Ganz, New York Daily News, 12 Feb. 2025

Word History

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for mediator

• activator
• actuator
• agitator
• alligator
• allocator
• alternator
• animator
• annotator
• applicator
• arbitrator
• aspirator
• aviator

Kids Definition

mediator

noun

me·​di·​a·​tor ˈmēd-ē-ˌāt-ər 

: one that mediates

mediatory

-ē-ə-ˌtōr-ē

-ˌtȯr-

adjective

Medical Definition

mediator

noun

me·​di·​a·​tor ˈmēd-ē-ˌāt-ər 

: 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 

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