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English definition of “stimulus”

stimulus

noun [C]     /ˈstɪm.jʊ.ləs/ (plural stimuli /ˈstɪm.jʊ.laɪ/)
C2 something that causes growth or activity: Foreign investment has been a stimulus to the industry. The book will provide a stimulus to research in this very important area.Encouraging and urging onInspiration and inspiring specialized biology something that causes part of the body to react: The tip of the tongue is sensitive to salt and sweet stimuli and the back of the tongue is sensitive to bitter stimuli.Animal and plant biology - general words
(Definition of stimulus noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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