The Collaborative International Dictionary of English v.0.48:

Printing \Print"ing\, n.
   The act, art, or practice of impressing letters, characters,
   or figures on paper, cloth, or other material; the business
   of a printer, including typesetting and presswork, with their
   adjuncts; typography; also, the act of producing photographic
   prints.
   [1913 Webster]

   Block printing. See under Block.

   Printing frame (Photog.), a shallow box, usually having a
      glass front, in which prints are made by exposure to
      light.

   Printing house, a printing office.

   Printing ink, ink used in printing books, newspapers, etc.
      It is composed of lampblack or ivory black mingled with
      linseed or nut oil, made thick by boiling and burning.
      Other ingredients are employed for the finer qualities.
      --Ure.

   Printing office, a place where books, pamphlets, or
      newspapers, etc., are printed.

   Printing paper, paper used in the printing of books,
      pamphlets, newspapers, and the like, as distinguished from
      writing paper, wrapping paper, etc.

   Printing press, a press for printing, books, newspaper,
      handbills, etc.

   Printing wheel, a wheel with letters or figures on its
      periphery, used in machines for paging or numbering, or in
      ticket-printing machines, typewriters, etc.; a type wheel.
      [1913 Webster]

WordNet (r) 3.0 (2006):

printing press
    n 1: a machine used for printing [syn: press, printing
         press]