Source : Webster's Revised Unabridged Dictionary (1913)

Telegraphy \Te*leg"ra*phy\, n. [Cf. F. t['e]l['e]graphie.]
   The science or art of constructing, or of communicating by
   means of, telegraphs; as, submarine telegraphy.

Source : WordNet®

telegraphy
     n 1: communicating at a distance by electric transmission over
          wire
     2: apparatus used to communicate at a distance over a wire
        (usually in Morse code) [syn: {telegraph}]