noun (n)

• a trait of dignified seriousness(noun.attribute)

  Synonym:
  sedateness, solemness, staidness
  

  source: wordnet30
• a solemn and dignified feeling(noun.feeling)

  Synonym:
  gravity
  Antonym:
  levity
  

  source: wordnet30
• A rite or ceremony performed with religious reverence; religious or ritual ceremony; as, the solemnity of a funeral, a sacrament.(noun)

  source: webster1913