law: Indian Telegraph Act, 1885
  3. Definitions
  In this Act, unless there is something repugnant in the subject
  
  or context,-
   3  [(1) "telegraph" means any appliance,
  
  instrument, material or apparatus used or capable of use for transmission or
  
  reception of signs, signals, writing, images, and sounds or intelligence of any
  
  nature by wire, visual or other electro-magnetic emissions, radio waves or
  
  Hertzian waves, galvanic, electric or magnetic means;
  Explanation: "Radio waves" or "Hertzian
  
  waves" means electromagnetic waves of frequencies lower than 3,000
  
  giga-cycles per sound propagated in space without artificial guide.]
  (2) "telegraph officer" means any person employed
  
  either permanently or temporarily in connection with a telegraph established,
  
  maintained or worked by 4[the Central Government] or by a person
  
  licensed under this Act;
  (3) "message" means any communications sent by
  
  telegraph, or given to a telegraph officer to be sent by telegraph or to be
  
  delivered;
  (4) "telegraph line" means a wire or wires used for
  
  the purpose of a telegraph, with any casing, coating, tube or pipe enclosing
  
  the same, and any appliances and apparatus connected therewith for the purpose
  
  of fixing or insulating the same;
  (5) "post" means a post, pole, standard, stay, strut
  
  or other above ground contrivance for carrying, suspending or supporting a
  
  telegraph line;
  (6) "telegraph authority" means the Director General
  
  of 5[Posts and Telegraphs], and includes any officer empowered by
  
  him to perform all or any of the functions of the telegraph authority under
  
  this Act;
  (7) "local authority" means any municipal committee,
  
  district board, body of port commissioners or other authority legally entitled
  
  to, or entrusted by 4[the Central or any State Government] with, the
  
  control or management of any municipal or local fund.