Definition of extravagance

• n. - A wandering beyond proper limits; an excursion or sally from the usual way, course, or limit.
• n. - 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.