noun
1.
Synonyms: marriage broker , matchmaker
2.
an intermediate agent between individuals or groups
served as a go-between in the labor dispute
Synonyms: broker, entrepreneur, interagent, interceder, intercessor, intermediary, intermediate, intermediator, mediator, middleman
Related Word: agent, attorney, deputy, factor, proxy; emissary, envoy, messenger; delegate, representative; arbitrator, negotiator