I. ˈ ̷ ̷ˌ ̷ ̷ noun
1.
a. : the diffused and reflected light of the sky
the flux density due to sunlight and skylight — H.G.Houghton
b. : the general background of illumination of the nighttime sky that includes light from both natural and artificial sources : airglow
2. : an opening in a roof or a deck of a ship covered with translucent or transparent material (as glass or plastic) and designed for the admission of light
II. transitive verb
: to light (as a room) by a skylight