Mediator (disambiguation)
Mediator is a person who engages in mediation.
It may also refer to:
- Business mediator, a mediator in business
 - Vanishing mediator, a philosophical concept
 - Mediator variable, in statistics
 
Chemistry and biology
- Mediator (coactivator), a multiprotein complex that functions as a transcriptional coactivator
 - Endogenous mediator, proteins that enhance and activate the functions of other proteins
 - Gaseous mediator, chemicals produced by some cells that have biological signalling functions
 - Mediator, a brand name of benfluorex, a withdrawn anorectic and hypolipidemic medication
 
Internet, software, and computer
- Mediator pattern, in computer science
 - A mail server's role in email forwarding
 
Other
- Mediator, guitar pick or plectrum, an accessory for picking strings of musical instruments
 - The Mediator, a teen book series by Meg Cabot (some under the pseudonym Jenny Carroll)
 - The Mediator, a television documentary produced by Open Media
 - Mediator (Christ as Mediator), an office of Jesus Christ
 - Linesman/Mediator, a radar system in the United Kingdom
 - HMS Mediator, three ships of the British navy
 - USS Mediator, a ship of the United States navy
 - "Mediator", a song by Jinjer from Wallflowers (album)