window
n.n. an opening in a wall or a vehicle that has glass in it. A window lets in light, and you can often open it for fresh air.
n. an opening in the wall of a building or vehicle, fitted with glass in a frame, to admit light and allow inhabitants to see out.
I open the window for some fresh air.
From her office window, she watched the rain fall on the busy street below.
From the airplane window, the sprawling city below resembled a vast, intricate circuit board, its lights flickering on as dusk settled over the landscape.
From Middle English wyndowe, wyndown—itself from Old Norse vindauga, a compound of vindr “wind” and auga “eye”. The Norse word spread across the North Sea into Scots (windae, windock), Faroese (vindeyga), Norwegian (vindu, vindauge), Danish (vindue), and even the forest dialect of Elfdalian (windog), while elbowing out the native Old English ēagþȳrel (“eye-hole”), whose last wheeze survives in the dialect word eyethurl.
A wind-eye was exactly what it said: an unglazed aperture in wall or roof through which the weather could look in and the smoke could look out. Glass arrived later, but the name had already stuck, like a draught that refuses to leave the room.