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1. Depressingly dark
   "the gloomy forest"
   - glooming [archaic], gloomful [archaic], sulky
    
2. Filled with melancholy and despondency
   "gloomy at the thought of what he had to face"; "gloomy predictions"; "a gloomy silence"
   - grim, blue, depressed, dispirited, down, downcast, downhearted, down in the mouth, low, low-spirited
    
3. Causing dejection
   "a dark gloomy day"
   - blue, dark, dingy, disconsolate, dismal, grim, sorry, drab, drear, dreary

Derived forms: gloomiest, gloomier

See also: cheerless, dark, dejected, depressing, gloom, gloomily, gloominess, uncheerful

Encyclopedia: Gloomy