Definition of "toplight"

Although exhibiting some typical Bulleid design features — the continuous curve of the bodyside and the toplights above the door droplights being particularly characteristic — the interior of the vehicles owed much to Maunsell era practice.

1979 August, Graham Burtenshaw, Michael S. Welch, “O.V.S. Bulleid's SR loco-hauled coaches - 1”, in Railway World, page 395