telegraph
noun [ U ] uk/ˈtel.ɪ.ɡrɑːf/ /ˈtel.ɪ.ɡræf/ us/ˈtel.ə.ɡræf/
（尤指过去的）电报；电报机
(especially in the past) a method of sending and receiving messages by electrical or radio signals, or the special equipment used for this purpose
The news came by telegraph. 这个消息是由电报传来的。