The term TELEGRAPH USER can be broken down into two parts: SENDER (6 letters) and TELEGRAPH (9 letters). The term SENDER refers to someone who sends a message or communication via a TELEGRAPH. A TELEGRAPH is an electrical device used to send messages over long distances, usually through wires. The term TELEGRAPH USER refers to someone who uses a TELEGRAPH to send messages. This could include a person sending a message to another person, or a business sending a message to its customers.