window

a framework of wood or metal that contains a glass windowpane and is built into a wall or roof to admit light or air

a transparent opening in a vehicle that allow vision out of the sides or back; usually is capable of being opened

a transparent panel (as of an envelope) inserted in an otherwise opaque material

an opening that resembles a window in appearance or function; "he could see them through a window in the trees"

the time period that is considered best for starting or finishing something; "the expanded window will give us time to catch the thieves"; "they had a window of less than an hour when an attack would have succeeded"

a pane of glass in a window; "the ball shattered the window"

an opening in a wall or screen that admits light and air and through which customers can be served; "he stuck his head in the window"

(computer science) a rectangular part of a computer screen that contains a display different from the rest of the screen