Definition of telegraph noun from the Oxford Advanced Learner's Dictionary

 

telegraph

 noun
noun
BrE BrE//ˈtelɪɡrɑːf//
 
; NAmE NAmE//ˈtelɪɡræf//
 
Communication devices
 
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[uncountable] a method of sending messages over long distances, using wires that carry electrical signals telegraph wires See related entries: Communication devices Word Origin early 18th cent.: from French télégraphe, from télé- ‘at a distance’ + -graphe (from French, based on Greek graphos ‘written, writing’).
See the Oxford Advanced American Dictionary entry: telegraph