Source : Webster's Revised Unabridged Dictionary (1913)

Window \Win"dow\, n. [OE. windowe, windoge, Icel. vindauga
   window, properly, wind eye; akin to Dan. vindue. ????. See
   {Wind}, n., and {Eye}.]
   1. An opening in the wall of a building for the admission of
      light and air, usually closed by casements or sashes
      containing some transparent material, as glass, and
      capable of being opened and shut at pleasure.

            I leaped from the window of the citadel. --Shak.

            Then to come, in spite of sorrow, And at my window
            bid good morrow.                      --Milton.

   2. (Arch.) The shutter, casement, sash with its fittings, or
      other framework, which closes a window opening.

   3. A figure formed of lines crossing each other. [R.]

            Till he has windows on his bread and butter. --King.

Window \Win"dow\, v. t. [imp. & p. p. {Windowed}; p. pr. & vb.
   n. {Windowing}.]
   1. To furnish with windows.

   2. To place at or in a window. [R.]

            Wouldst thou be windowed in great Rome and see Thy
            master thus with pleach'd arms, bending down His
            corrigible neck?                      --Shak.

Source : WordNet®

window
     n 1: a framework of wood or metal that contains a glass
          windowpane and is built into a wall or roof to admit
          light or air
     2: a transparent opening in a vehicle that allow vision out of
        the sides or back; usually is capable of being opened
     3: a transparent panel (as of an envelope) inserted in an
        otherwise opaque material
     4: an opening that resembles a window in appearance or
        function; "he could see them through a window in the
        trees"
     5: the time period that is considered best for starting or
        finishing something; "the expanded window will give us
        time to catch the thieves"; "they had a window of less
        than an hour when an attack would have succeeded"
     6: a pane in a window; "the ball shattered the window" [syn: {windowpane}]
     7: an opening in the wall of a building (usually to admit light
        and air); "he stuck his head in the window"
     8: (computer science) a rectangular part of a computer screen
        that contains a display different from the rest of the
        screen