mediator

mediator — noun

1. a person or organization that helps people who are arguing to find a solution th

1.nounB2
Definition

a person or organization that helps people who are arguing to find a solution that both sides can accept, instead of letting a judge or other authority decide for them.

Example

The company hired a mediator to help resolve the workers' pay dispute.

collocation: hired a mediator; resolve a dispute

As a neutral mediator, Walid listened carefully to both sides of the argument.

collocation: neutral mediator

Common collocations
  • neutral mediator
  • independent mediator
  • skilled mediator
  • professional mediator
  • act as a mediator
  • serve as a mediator
  • appoint a mediator
  • mediator in a dispute
  • mediator between parties
Synonyms
  • negotiator

    focuses on bargaining for advantage, often on behalf of one side, whereas a mediator stays neutral between both sides

  • intermediary

    broader term for someone who passes messages between parties; does not necessarily try to resolve a disagreement

  • facilitator

    helps a group work together smoothly, but not specifically focused on settling a dispute

  • peacemaker

    less formal, more emotional connotation; suggests ending hostility rather than reaching a structured agreement

Antonyms
  • instigator

    someone who deliberately stirs up conflict rather than resolving it

  • agitator

    someone who encourages people to protest or rebel, the opposite of calming a dispute

Grammar Patterns

mediator + between + noun_phrase

mediator + in + noun_phrase

Usage Note

Unlike an arbitrator, a mediator does not make a binding decision — their role is to guide discussion and help the opposing sides reach their own agreement. The word is most common in workplace, legal, and diplomatic contexts.

Common Mistakes

The judge acted as a mediator and ordered both sides to accept the settlement.
The judge acted as an arbitrator and ordered both sides to accept the settlement.
An arbitrator imposes a solution; a mediator only helps the parties find their own agreement.
She was the mediator of the department and planned the weekly meetings.
She was the coordinator of the department and planned the weekly meetings.
A mediator handles disagreements; a coordinator organizes tasks and schedules.

Word family

Synonym discussion

Sense: noun/1

All five words describe someone who works between other people, but they differ in neutrality, authority, and goal. A mediator is neutral and has no power to impose a decision — they simply help opposing sides talk. A negotiator usually represents one side in a deal or discussion and tries to get the best outcome for that side, making them partial by nature. An intermediary passes messages or goods between parties; they may be neutral, but they do not actively try to resolve a conflict. A facilitator helps a group communicate and work efficiently, but the setting is often a meeting or workshop rather than a heated dispute. An arbitrator has authority to make a binding ruling that both sides must follow, unlike a mediator who leaves the final decision to the parties themselves. For example, a labour dispute might begin with a mediator; if that fails, an arbitrator may be called in to decide.

mediator ↗negotiatorintermediaryfacilitator ↗arbitrator

Common collocations

Phrases

  • act as a mediator
  • serve as a mediator
  • appoint a mediator
  • bring in a mediator

Prepositions

  • mediator between
  • mediator in

Etymology

LatinEnglish

From Latin 'mediator' (one who mediates), from 'mediari' (to stand in the middle), from 'medius' (middle). The word entered English in the 1300s, at first used in religion for Christ as the mediator between God and humankind. By the 1600s it had broadened to any person who intervenes between two sides in a dispute.