noun (n)

• the state of being humble and unimportant(noun.state)

  Synonym:
  humbleness, lowliness, obscureness
  

  source: wordnet30
• the quality of not being important or worthy of note(noun.attribute)

  Antonym:
  importance
  

  source: wordnet30
• Want of importance; triviality.(noun)

  source: webster1913