gloom in WordNet English dictionary

1. a feeling of melancholy apprehension
   gloom  gloominess  somberness  sombreness 
   
2. a state of partial or total darkness
   "he struck a match to dispel the gloom"
   gloom  somberness  sombreness 
   
3. an atmosphere of depression and melancholy
   "gloom pervaded the office"
   gloom  gloominess  glumness