1. In a wall, an aperture whose sides have been cut back and/or whose underside has been sloped downward so as to admit a greater amount of light to the interior of the room.
2. A skylight.
1. In a wall, an aperture whose sides have been cut back and/or whose underside has been sloped downward so as to admit a greater amount of light to the interior of the room.
2. A skylight.