/ Dictionary / Index S stimulus: Meaning and Definition of Find definitions for: stim•u•lus Pronunciation: (stim'yu-lus), [key] — pl. -li something that incites to action or exertion or quickens action, feeling, thought, etc.: The approval of others is a potent stimulus. something that excites an organism or part to functional activity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: stimulus (Thesaurus) stimulative stimulus generalization 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