gloomy

Definitions:

Overspread with, or wrapped in, darkness; dismal; cheerless.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adjective) (adj.) (adjective)
Gloomiest.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (superl.) (superlative)
Dim or obscure: dimly lighted: sad, melancholy.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (adjective) (adj.) (adjective)
Sad; sullen; dimly lighted; dark.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (adjective) (adj.) (adjective)
Dark; dismal; clouded; heavy of heart.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (adjective) (adj.) (adjective)
Gloominess.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (noun) (n.) (noun)
Gloomier.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (comp.) (comparative)
Dark, dim, or dusky; dismal; wearing the aspect of sorrow; melancholy; dejected; of a dark complexion.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (adjective) (adj.) (adjective)
Gloomily.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adverb) (adv.) (adverb)

Usage examples:

" Tea is ready," says Sonia; " but what is the matter, dear, you look so gloomy
- Boris Lensky by Ossip Schubin
He recalled how he had abruptly left the building, returning later, silent and gloomy
- If Any Man Sin by H. A. Cody
Pierre was still walking straight ahead, mechanically, carried on by his gloomy reverie.
- Paris From the "Three Cities" by Emile Zola