Window  

From The Art and Popular Culture Encyclopedia

Agostino Novello saves a falling child c. 1328 Simone Martini, an example of defenestration

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1. An opening, usually covered by one or more panes of clear glass, to allow light and air from outside to enter a building or vehicle.
   • 1952: A window is an opening in a wall to admit light and air. — L.F. Salzman, Building in England, p. 173.
2. An opening, usually covered by glass, in a shop which allows people to view the shop and its products from outside.
3. A period of time when something is available.

   launch window

   window of opportunity

Windows as elements in illustrations and paintings - Left: Henry Holiday's depiction of the Baker's uncle (in Lewis Carroll's The Hunting of the Snark, 1876) with some of the Baker's 42 boxes outside of the window. Right top: John Everett Milais: Christ in the House of his Parents (aka The Carpenter's Shop, 1850, Pre-Raphaelite) with a flock of sheep outside of the window symbolizing the the laity). Right bottom: Edward VI and the Pope: An Allegory of Reformation (mirrored view, 16^th century) with a violence scene of the reformation depicted outside of the window.