telegraph code

noun
  1. A system of signals or symbols used to represent letters or numbers in telegraphy, often to facilitate faster or more efficient communication. noun
    The telegraph code was essential for sending messages quickly over long distances.
    Operators had to memorize the telegraph code to efficiently translate messages.
  2. A set of predefined words or phrases used to convey specific messages or instructions in telegraphy, often to ensure clarity and reduce the length of messages. noun
    Using a telegraph code, the message 'ARRIVED SAFELY' could be sent with just a few characters.
    Shipping companies often used a telegraph code to communicate efficiently with their vessels.