(n.) 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.

afterglow air glow bay bay window bow window candescence casement casement window ceiling eaves fan window fanlight flush gleam glint gloss glow grille housetop incandescence lancet window lantern lattice light louver window luster oriel overhead pane penthouse picture window plafond port porthole ridgepole roof roof garden roof-deck roofage roofing roofpole rooftop rooftree rose window sheen shine shingles shininess shining light slates sunset glow tiles top transom wicket window window bay window glass windowpane