1.  wireless telegraphy(n = noun.communication) radiotelegraph, radiotelegraphy - telegraphy that uses transmission by radio rather than by wire;
is a kind of wireless

2.  wireless telegraphy(n = noun.artifact) radiotelegraph, radiotelegraphy, wireless telegraph - the use of radio to send telegraphic messages (usually by Morse code);
is a kind of radio, wireless

telegraphy, wireless, wireless fidelity, wireless local area network, wireless telegraph, wireless telephone