/ Dictionary / Index I impetuous: Meaning and Definition of Find definitions for: im•pet•u•ous Pronunciation: (im-pech'-us), [key] — adj. of, pertaining to, or characterized by sudden or rash action, emotion, etc.; impulsive: an impetuous decision; an impetuous person. having great impetus; moving with great force; violent: the impetuous winds. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: impetuous (Thesaurus) impetuosity impetus 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