window

A pane of glass in a window.

“the ball shattered the 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.

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”

An opening that resembles a window in appearance or function.

“he could see them through a window in the trees”

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.

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

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”