Interested in Language
The context is:
I hate the hospitals. Always have. The bright lights, the sludge green walls, the noise of metal on metal, the sheer bloody misery hanging over the halls like a shroud - I hated the lot of it.
What does the bold sentence mean? the sad, glooming atmosphere in the hospital hall?
(only it should be 'gloomy', not '-ing'). A shroud is traditionally used to wrap up a dead body before burial.