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go-between

American  
[goh-bi-tween] / ˈgoʊ bɪˌtwin /

noun

  1. a person who acts as an agent or intermediary between persons or groups; emissary.

    Synonyms:
    arbitrator, mediator, liaison, envoy, deputy, negotiator, middleman
go-between British  

noun

  1. a person who acts as agent or intermediary for two people or groups in a transaction or dealing

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of go-between

First recorded in 1590–1600; noun use of verb phrase go between

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.