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Definition of mediator

mediator

/ˈmiːdieɪtər/
me · di · a · tor

Plural:mediators
•
Adjective:mediatorial
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mediator Lexical Profile

mediator Game Scores & Validity

• noun

1

A neutral person or entity that intervenes between two or more disputing parties in order to help them reconcile their differences or reach a mutually acceptable agreement.

Example

"The labor union and corporate management agreed to bring in an independent mediator to resolve the contract dispute."


2

In biochemistry and physiology, a chemical substance or agent (such as a neurotransmitter or hormone) that transmits a signal or initiates a specific physiological response.

Example

"Histamine acts as a primary chemical mediator in the body during an allergic reaction."

Synonyms
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Antonyms
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Word Nuance & Usage

In legal and formal contexts, a mediator is distinct from an arbitrator: a mediator facilitates communication to help disputing parties reach a voluntary agreement, whereas an arbitrator hears evidence and renders a binding decision.

• Rhymes for mediator

Word Origin & Etymology

Borrowed in the 14th century from Old French mediateur and Late Latin mediator, derived from the verb mediare ('to halve' or 'to be in the middle'), from Latin medius ('middle').

Cite this Entry


Wordmom. (2026). Definition of Mediator. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/mediator
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