Definition of Gloomy

Adjective: gloomy (gloomier,gloomiest) gloo-mee

Depressingly dark
"the gloomy forest";
- glooming [archaic], gloomful [archaic], sulky
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
Causing dejection
"a dark gloomy day";
- blue, dark, dingy, disconsolate, dismal, grim, sorry, drab, drear, dreary