English to English

noun (n)

• an earnest and sincere feeling(noun.feeling)

  Synonym:
  seriousness, sincerity
  

  source: wordnet30
• the trait of being serious(noun.attribute)

  Synonym:
  serious-mindedness, seriousness, sincerity
  Antonym:
  frivolity, frivolousness
  

  source: wordnet30
• The state or quality of being earnest; intentness; anxiety.(noun)

  source: webster1913