noun (n)

• a state of partial or total darkness(noun.state)

  Synonym:
  gloom, sombreness
  

  source: wordnet30
• a feeling of melancholy apprehension(noun.feeling)

  Synonym:
  gloom, gloominess, sombreness
  

  source: wordnet30
• a manner that is serious and solemn(noun.attribute)

  Synonym:
  graveness, gravity, soberness, sobriety, sombreness
  

  source: wordnet30
• The quality or state of being somber; gloominess.(noun)

  source: webster1913