Definition of: window

(win′dō) noun
1. An opening in the wall of a building, to admit light or air, capable of being opened and closed, and including, architecturally, the casement, sash, panes, etc.; in common usage, sometimes, the sash alone: Raise the window.
2. A windowpane.
3. Anything resembling or suggesting a window; a windowlike aperture: The eyes are the windows of the soul.
4. A transparent patch through which the address of an envelope can be read.
—v.t.
1. To provide with a window or windows.
2. To fill with holes resembling windows. [<ON vindauga <vindr wind + auga an eye]