Window
This article is about the part of a building. For the graphical user interface element, see Window (computing). For other uses, see Window (disambiguation) and Windows (disambiguation). Window of traditional design in Porto Covo, Portugal Cylindrical lattice window of Sumburgh Head Lighthouse (Shetland). A window is an opening in a wall, door, roof or vehicle that allows the passage of light, sound, and air. Modern windows are usually glazed or covered in some other transparent or translucent material, a sash set in a frame [1] in the opening; the sash and frame are also referred to as a window. [2] Many glazed windows may be opened, to allow ventilation, or closed, to exclude inclement weather. Windows often have a latch or similar mechanism to lock the window shut or to hold it open by various amounts. Types include the eyebrow window, fixed windows, single-hung and double-hung sash windows, horizontal sliding sash windows, casement windows, awning windows, hopper windows, tilt an...