/ Dictionary / Index F fastuous: Meaning and Definition of Find definitions for: fas•tu•ous Pronunciation: (fas'ch-us), [key] — adj. haughty; arrogant. showy; ostentatious. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fast-twitch fast worker Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language