An intermediary is a person or entity that acts as a middleman between two parties to facilitate communication, negotiation, or transaction. In other words, an intermediary is someone who stands between others and provides a link, service or good on behalf of one or both sides. They can be involved in various types of activities such as mediation, arbitration, brokering, etc., depending upon the nature of their role. An example of an intermediary could be a real estate agent who acts as a go-between for buyers and sellers during property transactions.