Source : Webster's Revised Unabridged Dictionary (1913)

Gloomy \Gloom"y\, a. [Compar. {Gloomier}; superl. {Gloomiest}.]
   1. Imperfectly illuminated; dismal through obscurity or
      darkness; dusky; dim; clouded; as, the cavern was gloomy.
      ``Though hid in gloomiest shade.'' --Milton.

   2. Affected with, or expressing, gloom; melancholy; dejected;
      as, a gloomy temper or countenance.

   Syn: Dark; dim; dusky; dismal; cloudy; moody; sullen; morose;
        melancholy; sad; downcast; depressed; dejected;
        disheartened.

Source : WordNet®

gloomiest
     See {gloomy}

gloomy
     adj 1: characterized by hopelessness; filled with gloom; "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" [syn: {grim}, {darkening}]
     2: depressing in character or appearance; "drove through dingy
        streets"; "the dismal prison twilight"- Charles Dickens;
        "drab old buildings"; "a dreary mining town"; "gloomy
        tenements"; "sorry routine that follows on the heels of
        death"- B.A.Williams [syn: {dingy}, {dismal}, {drab}, {drear},
         {dreary}, {sorry}]
     3: depressingly dark; "the gloomy forest"; "the glooming
        interior of an old inn"; "`gloomful' is archaic" [syn: {glooming},
         {gloomful}]
     4: causing or suggestive of sorrow or gloom; "a gloomy
        outlook"; "gloomy news" [syn: {depressing}, {depressive},
        {saddening}]
     5: reflecting gloom; "gloomy faces" [syn: {glum}, {long-faced}]
     6: 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" [syn:
         {blue}, {dark}, {depressing}, {disconsolate}, {dismal}, {dispiriting},
         {grim}]
     [also: {gloomiest}, {gloomier}]