Definition of window

• n. - An opening in the wall of a building for the admission of light and air, usually closed by casements or sashes containing some transparent material, as glass, and capable of being opened and shut at pleasure.
• n. - The shutter, casement, sash with its fittings, or other framework, which closes a window opening.
• n. - A figure formed of lines crossing each other.
• v. t. - To furnish with windows.
• v. t. - To place at or in a window.