skylight

An overhead window, as in a roof, admitting daylight.

Light from the sky.

A hole in the congealed surface of a lava flow, through which flowing lava can be seen.

A window placed in the roof of a house, or in a ceiling; a frame set with glass, whether horizontal or in one or more inclined planes, and placed in a roof or ceiling, or in some cases, as in photographers’ studios, forming a considerable part of the roof, for the purpose of lighting passages or rooms below, or for affording special facilities for lighting, as for artists’ or photographers’ needs.

The light of the sky; specifically, the blue or pale white color of the aërial vault.

Illumination by means of the light of the sky: as, a studio with a good skylight.

A window placed in the roof of a building, in the ceiling of a room, or in the deck of a ship, for the admission of light from above.

A window, dome, or opening in the roof or ceiling, to admit natural light.

Diffuse sky radiation—solar radiation reaching the earth‘s surface after having been scattered from the direct solar beam by molecules or suspensoids in the atmosphere

a window in a roof to admit daylight