noun (n)

• the quality of exceeding the appropriate limits of decorum or probability or truth(noun.attribute)

  Example:
  We were surprised by the extravagance of his description.
  

  Synonym:
  extravagancy
  

  source: wordnet30
• the trait of spending extravagantly(noun.attribute)

  Synonym:
  prodigality, profligacy
  

  source: wordnet30
• excessive spending(noun.act)

  Synonym:
  high life, highlife, lavishness, prodigality
  

  source: wordnet30
• A wandering beyond proper limits; an excursion or sally from the usual way, course, or limit.(noun)

  source: webster1913