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1. (trademark) an operating system with a graphical user interface

1. A framework holding a pane or panes of glass (or transparent plastic, etc.), built into a wall or roof to admit light, provide a view or allow ventilation
    
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 of glass in a window
   "the ball shattered the window";
   - windowpane
    
7. An opening in a wall or screen that admits light and air and through which customers can be served
   "he stuck his head in the window"
    
8. (computing) a rectangular part of a computer screen that contains a display different from the rest of the screen

Type of: display, frame, framework, gap, opening, operating system, OS, pane, pane of glass, panel, period, period of time, time period, time span, video display, window glass

Part of: auto [informal], autobus, autocar [archaic], automobile [N. Amer], building, bus, car, charabanc [Brit], coach, computer display, computer screen, double-decker, edifice, jitney [N. Amer, informal], monitor, motorbus, motorcar, motorcoach, omnibus, passenger vehicle, wheel [informal], whip [US, informal], window envelope

Encyclopedia: Windows, Icons, Menus, Pointers