A1[C]a space usually filled with glass in the wall of a building or in a vehicle, to allow light and air in and to allow people inside the building to see out: Is it all right if I open/close the window?He caught me staring out of the window.I saw a child's face at the window.She's got some wonderful plants in the window (= on a surface at the bottom of the window).I was admiring the cathedral's stained-glass windows.Have you paid the window cleaner(= person whose job is to clean the outside of windows)?window framesa window ledgeWindows and parts of windows›[S]literarysomething that makes it possible for you to see and learn about a situation or experience that is different from your own: The film provides a window on the immigrant experience.Opportunity Freedom to act›[C]a transparent rectangle on the front of an envelope, through which you can read the address written on the letter insideThe postal system›[C]the decorative arrangement of goods behind the window at the front of a shop, in addition to the window itself: How much is the jacket in the window?The shop windows are wonderful around Christmas time.Parts of shops, shop fittings and retail activities