The Collaborative International Dictionary of English v.0.48:

Lithography \Li*thog"ra*phy\, n. [Cf. F. lithographie.]
   1. The art or process of putting designs or writing, with a
      greasy material, on stone, and of producing printed
      impressions therefrom. The process depends, in the main,
      upon the antipathy between grease and water, which
      prevents a printing ink containing oil from adhering to
      wetted parts of the stone not covered by the design. See
      Lithographic limestone, under Lithographic.
      [1913 Webster]

   2. a printing process for reproducing images, using any flat
      surface, such as a metal plate, in a manner similar to
      lithography[1].
      [PJC]

   3. The process of producing patterns on semiconductor
      crystals by exposing photosensitive coatings on a matrix,
      such as silicon, to light patterns in the form desired for
      the circuit, and subsequently treating (e.g., chemically)
      the patterns thus formed in such a way as to create
      integrated semiconductor circuits with the desired
      properties. This is the principle method (1990's) to
      create the high-density integrated circuits used in the
      digital computers on which you are reading this.
      [PJC] Lithoid

WordNet (r) 3.0 (2006):

lithography
    n 1: a method of planographic printing from a metal or stone
         surface
    2: the act of making a lithographic print