/ Dictionary / Index E extravagancy: Meaning and Definition of Find definitions for: ex•trav•a•gan•cy Pronunciation: (ik-strav'u-gun-sē), [key] — pl. -cies. extravagance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: extravagancy (Thesaurus) extravagance extravagant Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language