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1. An atmosphere of depression and melancholy
   - gloom, glumness
    
2. A feeling of melancholy apprehension
   - gloom, somberness [US], sombreness [Brit, Cdn]
    
3. The quality of excessive mournfulness and uncheerfulness
   - lugubriousness, sadness, tristesse [literary]
    
4. The property of having a frowning or scowling appearance.
   "Virgil has alluded to the gloominess of his countenance in a passage which has given great disgust to the critics."

Type of: ambiance, ambience, apprehension, apprehensiveness, aspect, atmosphere, dread, expression, face, facial expression, look, melancholy, misgiving, uncheerfulness

Encyclopedia: Gloominess