1. An agent between two parties; a broker; a go-between; any dealer between the producer and the consumer; in Ireland, one who takes land of the proprietors in large tracts, and then rents it out in small portions to the peasantry. [ 1913 Webster ]
2. A person of intermediate rank; a commoner. [ 1913 Webster ]
3. (Mil.) The man who occupies a central position in a file of soldiers. [ 1913 Webster ]
(n) a person who is in a position to give you special assistance, Syn. middleman, Example:he used his business contacts to get an introduction to the governor