Definition from Wiktionary, the free dictionary
skylight (plural skylights)
- 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 hole in the upper part of a lava tube, yielding a view of the lava within.
opening in the roof