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

Israel’s Cabinet approved the ceasefire early Saturday in a rare session during the Jewish Sabbath, more than two days after mediators announced the deal. —Samy Magdy, Chicago Tribune, 19 Jan. 2025

Israel’s Cabinet approved the cease-fire early Saturday in a rare session during the Jewish Sabbath, more than two days after mediators announced the deal. —Wafaa Shurafa, Los Angeles Times, 19 Jan. 2025

The meeting comes two days after mediators announced the deal and a day after some ministers in Israeli Prime Minister Benjamin Netanyahu's cabinet delayed the vote. —Brittney Melton, NPR, 17 Jan. 2025

The first phase will go into effect on Sunday, the Prime Minister of Qatar, a key mediator, announced. —Ruth Margalit, The New Yorker, 16 Jan. 2025

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