/ Dictionary / Index F fatuous: Meaning and Definition of Find definitions for: fat•u•ous Pronunciation: (fach'-us), [key] — adj. foolish or inane, esp. in an unconscious, complacent manner; silly. unreal; illusory. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fatuous (Thesaurus) fatuity fatwa Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language