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skylight (EN)
noun

noun “skylight”

singular skylight, plural skylights or uncountable
  1. a window in the roof or ceiling that brings natural light into a building
    The kitchen was brighter after they added a skylight above the dining table.
  2. (in volcanology) a hole in the roof of a lava tube that allows one to see the flowing lava inside
    The scientists observed the glowing lava through a skylight in the lava tube.