extravagance

n.

  1. A wandering beyond proper limits; an excursion or sally from the usual way, course, or limit.
  2. The state of being extravagant, wild, or prodigal beyond bounds of propriety or duty; want of moderation; excess; especially, undue expenditure of money; vaid and superfluous expense; prodigality; as, extravagance of anger, love, expression, imagination, demands.