radiotelegraph

/ˌreɪdioʊˈtɛləɡræf/
noun
  1. A system or device for sending messages over long distances using radio waves instead of wires.
    • The ship's radiotelegraph sent a distress signal after the engine failed.
    • The museum displayed an old radiotelegraph used by the navy during World War II.
    • Early explorers relied on the radiotelegraph to communicate with their home countries.
  2. A message sent by such a system.
    • The radiotelegraph contained urgent instructions from headquarters.
    • She decoded the radiotelegraph and relayed the news to the crew.
    • The captain received a radiotelegraph ordering the ship to change course.
Synonyms
verb
  1. To send a message using a radiotelegraph system.
    • They radiotelegraphed for help when the storm hit.
    • He learned to radiotelegraph in Morse code during his training.
    • The operator radiotelegraphed the weather report to the mainland.