skylight (plural skylights)
- (architecture) A window, dome, or opening in the roof or ceiling, to admit natural light.
- (physics) 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.
- (volcanology) A hole in the upper part of a lava tube, yielding a view of the lava within.
opening in the roof
hole in a lava tube