A window set in a roof or ceiling to let natural light into a room from above. It can often be opened for fresh air as well as light.
“Skylight” is a compound of “sky” and “light,” formed in English. As buildings developed more complex roofs, the need for roof windows led to this straightforward name. The word emphasizes both the source (sky) and the function (light).
A skylight is literally a controlled hole in your roof that turns the sky into a lamp. The word feels poetic but is actually just plain English glued together. It’s a nice example of how English often names new inventions with simple, almost childlike logic.
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