extravagant

American Heritage® Dictionary of the English Language, Fourth Edition

1. adj. Given to lavish or imprudent expenditure: extravagant members of the imperial court.
2. adj. Exceeding reasonable bounds: extravagant demands. See Synonyms at excessive.
3. adj. Extremely abundant; profuse: extravagant vegetation.
4. adj. Unreasonably high; exorbitant: extravagant fees.
5. adj. Archaic Straying beyond limits or bounds; wandering.

Century Dictionary and Cyclopedia

1. Wandering beyond bounds or out of the regular course; straying.
2. Exceeding just or reasonable limits; excessive; exorbitant; unreasonable; lavish: as, the demands or desires of men are often extravagant; extravagant living or expenditure.
3. Not comprised within ordinary limits of truth, probability, or propriety; irregular; wild; fantastic: as, extravagant flights of fancy.
4. Exceeding necessity or prudence in expenditure; wasteful; prodigal; profuse: as, an extravagant purchase; an extravagant man.
5. Synonyms and Inordinate, exorbitant, unconscionable, absurd.
6. Extravagant, Profuse, Lavish, Wasteful, Prodigal, reckless. Extravagant and prodigal refer more often to habits or character, the others to acts. All apply to that which is immoderate or unreasonable in quantity or degree; wasteful to that which is injuriously so. One may be extravagant or wasteful with a small sum; it requires a large sum to enable one to be profuse, lavish, or prodigal. Lavish is stronger than profuse. Prodigal, perhaps from association with the prodigal son of Luke xv. 11-32, suggests most of immorality and reprobation. All these words have lighter figurative uses.
7. n. One who wanders about; a vagrant; a vagabond.
8. n. One who is confined to no general rule; an eccentric.
9. n. plural A part of the body of canon law: as, the Extravagants of John XXII. and the Extravagantes communes of other popes: so called because they treated of matters not in the decretals (extra decretum vagabantur).
10. n. A collection of Jewish traditions, published at the end of the second century.

Wiktionary

1. adj. exceeding the bounds of something
2. adj. extreme
3. adj. exorbitant

GNU Webster's 1913

1. adj. obsolete Wandering beyond one's bounds; roving; hence, foreign.
2. adj. Exceeding due bounds; wild; excessive; unrestrained.
3. adj. Profuse in expenditure; prodigal; wasteful.
4. n. One who is confined to no general rule.
5. n. (Eccl. Hist.) Certain constitutions or decretal epistles, not at first included with others, but subsequently made a part of the canon law.

WordNet 3.0

1. adj. recklessly wasteful
2. adj. unrestrained, especially with regard to feelings