noun (n)

• the quality of being unimportant and petty or frivolous(noun.attribute)

  Synonym:
  pettiness, puniness, slightness
  

  source: wordnet30
• a detail that is considered insignificant(noun.cognition)

  Synonym:
  technicality, trifle
  

  source: wordnet30
• something of small importance(noun.artifact)

  Synonym:
  small beer, trifle, trivia
  

  source: wordnet30
• The quality or state of being trivial; trivialness.(noun)

  source: webster1913