General Definition: 1. A screen-like opening and closing device or any thing or any action that can be associated with this in a given context. As a Noun: 1. A space in a wall or roof or in the side of a vehicle, often with glass in it so that light can pass through it and people can see through it. English = window. 2. A flat sheet of glass in a window or a door. English = windowpane, pane, pane of glass 3. A hard transparent substance that windows and bottles are made from. English = glass.