law: Indian Post Office Act, 1898 
  2. Definitions
  In this Act, unless
  
  there is anything repugnant in the subject or context,-
  (a) the expression
  
  "Director General" means the Director General of 4[Posts
  
  and Telegraphs];
  (b) the expression
  
  "inland," used in relation to a postal article, means-
  (i) posted in 5[ India ] and addressed to any
  
  place in 5[ India ] or to any place for
  
  which a post office is established by the 6[Central Government 7[***]]
  
  beyond the limits of 5[ India ]; or
  (ii) posted at any
  
  post office established by the 6[Central Government 7[***]]
  
  beyond the limits of 5[ India ] and addressed to any
  
  place for which any such post office is established or to any place in 5[ India ]:
   8  [Provided that
  
  the expression "inland" shall not apply to any class of postal articles
  
  which may be specified in this behalf by the Central Government by notification
  
  in the Official Gazette, when posted in or at or addressed to any places or
  
  post offices which may be described in such notification:]
  (c) the expression
  
  "mail bag" includes a bag, box, parcel or any other envelope or
  
  covering in which postal articles in course of transmission by post are
  
  conveyed, whether it does or does not contain any such article;
  (d) the expression
  
  "mail ship" means a ship employed for carrying mails, pursuant to
  
  contract or continuing arrangement, by the Central Government or Her Majesty's
  
  Government or the Government of any British possession or foreign country;
  (e) the expression
  
  "officer of the Post office" includes any person employed in any
  
  business of the Post Office or on behalf of the Post Office;
  (f) the expression
  
  "postage" means the duty chargeable for the transmission by post of
  
  postal articles;
  (g) the expression
  
  "postage stamp" means any stamp provided by the Central Government
  
  for denoting postage or other fees or sums payable in respect of postal
  
  articles under this Act, and includes adhesive postage stamps and stamps
  
  printed, embossed, impressed or otherwise indicated on any envelope, wrapper,
  
  postcard or other article;
  (h) the expression
  
  "post office" includes every house, building, room, carriage or place
  
  used for the purposes of the Post Office, and every letter-box provided by the
  
  Post Office for the reception of postal articles;
  (i) the expression
  
  "postal article" includes a letter, postcard, newspaper, book,
  
  pattern or sample packet, parcel and every article or thing transmissible by
  
  post;
  (j) the expression
  
  "Post Master General" includes a Deputy Post Master General or other
  
  officer exercising the powers of a Post Master General; and
  (k) the expression
  
  "Post Office" means the department, 9[established for the
  
  purpose of carrying the provisions of this Act into effect and] presided over
  
  by the Director General.