The term 'Send a Message by Wire' refers to the process of transmitting a message or data over a wire, such as a telephone line or cable. This is done by encoding the message into electrical signals and sending them through the wire. This method of communication has been used for many years and is still used today in various forms, such as the internet. The crossword solution for this term is 'TRANSMIT, ' which means to send something from one place to another.