noun (n)

• something that is an indulgence rather than a necessity(noun.attribute)

  source: wordnet30
• the quality possessed by something that is excessively expensive(noun.attribute)

  Synonym:
  lavishness, sumptuosity, sumptuousness
  

  source: wordnet30
• wealth as evidenced by sumptuous living(noun.state)

  Synonym:
  luxuriousness, opulence, sumptuousness
  

  source: wordnet30
• A free indulgence in costly food, dress, furniture, or anything expensive which gratifies the appetites or tastes.(noun)

  source: webster1913