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
6.a pane in a window;
the ball shattered the window
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