Definition of top light in English:

top light

noun

  • 1A small pane above a main window, which typically opens outwards and upwards.

    ‘the window was open at the top, for creeper could be seen disappearing through the top light’
    • ‘Instead of ridge planting she has inserted the glazed top light and surrounded it with planters buried in the thatch.’
    • ‘Horizontal bandings and circular-framed top lights accent the windows.’
  • 2A skylight.

    • ‘In Munich large paintings were displayed in lofty rooms fitted with top lights, while small cabinet pictures were hung in the surrounding rooms with windows at the side.’
    • ‘Daylighting also progresses with the domestic windows of the old, leading to the baffled top light of the long apertures that run the full length of the extension's rough plaster ceilings.’