2. gloomy causing gloom; depressing: a gloomy prospect.
3. gloomy filled with or showing gloom; melancholy: a gloomy mood.
Etymology: (1580–90)
Definition of 'gloomy'
Princeton's WordNet
1. (adj)glooming, gloomy, gloomful, sulky depressingly dark "the gloomy forest"; "the glooming interior of an old inn"; "`gloomful' is archaic"
2. (adj)gloomy, grim, blue, depressed, dispirited, down(p), downcast, downhearted, down in the mouth, low, low-spirited filled with melancholy and despondency "gloomy at the thought of what he had to face"; "gloomy predictions"; "a gloomy silence"; "took a grim view of the economy"; "the darkening mood"; "lonely and blue in a strange city"; "depressed by the loss of his job"; "a dispirited and resigned expression on her face"; "downcast after his defeat"; "feeling discouraged and downhearted"
3. (adj)blue, dark, dingy, disconsolate, dismal, gloomy, grim, sorry, drab, drear, dreary causing dejection "a blue day"; "the dark days of the war"; "a week of rainy depressing weather"; "a disconsolate winter landscape"; "the first dismal dispiriting days of November"; "a dark gloomy day"; "grim rainy weather"
Definitions of gloomy 
Afrikaans: somber, droefgeestige
Arabic: كَئيب
Bulgarian: тъжен
Brazilian: triste
Czech: smutný, sklíčený
German: schwermütig
Danish: forstemt
Greek: μελαγχολικός
Spanish: triste, melancólico, somb
Estonian: morn
Farsi: محزون؛ افسرده
Finnish: synkkämielinen
French: triste
Hebrew: עַגוּם
Hindi: अंधेरा
Croatian: tužan, depresivan
Hungarian: szomorú, bús
Indonesian: sedih
Icelandic: dapur, hnugginn
Italian: triste
Japanese: 憂うつな
Korean: 침울한
Lithuanian: liūdnas, nusiminęs
Latvian: nomākts; nospiests
Malay: muram
Dutch: somber
Norwegian: dyster, forstemt, melanko
Polish: ponury
Persian: محزون؛ افسرده
Pashto: غمجن، تت
Portuguese: triste
Romanian: trist
Russian: угрюмый
Slovak: smutný
Slovenian: potrt
Serbian: sumoran
Swedish: dyster
Thai: เศร้าหมอง
Turkish: üzgün
Taiwanese: 憂鬱的
Ukrainian: сумовитий, смутний
Urdu: اداس
Vietnamese: rầu rĩ
Chinese: 忧郁的
