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2 definitions found
 for Wireless telegraphy
From The Collaborative International Dictionary of English v.0.48 :

  Wireless \Wire"less\, a.
     Having no wire; specif. (Elec.), designating, or pertaining
     to, a method of telegraphy, telephony, or other information
     transmisssion, in which the messages, data, etc., are
     transmitted through space by electric waves; as, a wireless
     message; a wireless network; a wireless keyboard.
     [Webster 1913 Suppl. +PJC]
     Wireless telegraphy or Wireless telegraph (Elec.), any
        system of telegraphy employing no connecting wire or wires
        between the transmitting and receiving stations.
     Note: Although more or less successful researchers were made
           on the subject by Joseph Henry, Hertz, Oliver Lodge,
           and others, the first commercially successful system
           was that of Guglielmo Marconi, patented in March, 1897.
           Marconi employed electric waves of high frequency set
           up by an induction coil in an oscillator, these waves
           being launched into space through a lofty antenna. The
           receiving apparatus consisted of another antenna in
           circuit with a coherer and small battery for operating
           through a relay the ordinary telegraphic receiver. This
           apparatus contains the essential features of all the
           systems now in use.
     Wireless telephone, an apparatus or contrivance for
        wireless telephony.
     Wireless telephony, telephony without wires, usually
        employing electric waves of high frequency emitted from an
        oscillator or generator, as in wireless telegraphy. A
        telephone transmitter causes fluctuations in these waves,
        it being the fluctuations only which affect the receiver.
        [Webster 1913 Suppl.]

From WordNet (r) 3.0 (2006) :

  wireless telegraphy
      n 1: telegraphy that uses transmission by radio rather than by
           wire [syn: radiotelegraph, radiotelegraphy, wireless
      2: the use of radio to send telegraphic messages (usually by
         Morse code) [syn: radiotelegraph, radiotelegraphy,
         wireless telegraph, wireless telegraphy]

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