n. The art or science of constructing or using the electric telegraph; the transmission of messages by means of the electric telegraph. [ 1913 Webster ]
n. Telegraphy by means of light, as by the heliograph or the photophone. Also, less properly, telephotography. --
n. [ Radio- + telegraphy. ] Telegraphy using the radiant energy of radio waves; wireless telegraphy; -- the term adopted for use by the Radiotelegraphic Convention of 1912. [ Webster 1913 Suppl. ]
n. [ Cf. F. télégraphie. ] The science or art of constructing, or of communicating by means of, telegraphs;