adj. 25B6; adjective
a gloomy room : DARK, shadowy, sunless, dim, sombre, dingy, dismal, dreary, murky, unwelcoming, cheerless, comfortless, funereal; poetic/literary Stygian.
Joanna looked gloomy : DESPONDENT, downcast, downhearted, dejected, dispirited, disheartened, discouraged, demoralized, crestfallen; depressed, desolate, low, sad, unhappy, glum, melancholy, miserable, fed up, woebegone, mournful, forlorn, morose; informal blue, down in the mouth, down in the dumps.
gloomy forecasts about the economy : PESSIMISTIC, depressing, downbeat, disheartening, disappointing; unfavourable, bleak, bad, black, sombre, grim, cheerless, hopeless.
bright, cheerful, optimistic.