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

Each episode follows inheritance mediator Mamen Mayo and her law firm. —Lily Ford, The Hollywood Reporter, 20 June 2024

The Biden administration has pledged to keep working with the Qatari and Egyptian mediators to bridge the gaps. —Isabel Kershner, New York Times, 13 June 2024

Even with mediators’ permission, strikes can be delayed or blocked by the president and Congress. —Paolo Confino, Fortune, 13 June 2024

That’s because railway and airline workers are not allowed to strike unless given the green light by federal mediator groups, via the 1926 Railway Labor Act. —Amber Dasilva / Jalopnik, Quartz, 11 June 2024

Word History

First Known Use

14th century, in the meaning defined at sense 1

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