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Definition of stimulant noun from the Oxford Advanced American Dictionary

     

    stimulant

     noun
    noun
    NAmE//ˈstɪmyələnt//
     
     
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  1. 1a drug or substance that makes you feel more awake and gives you more energy Coffee and tea are mild stimulants.
  2. 2stimulant (to something) an event or activity that encourages more activity
See the Oxford Advanced Learner's Dictionary entry: stimulant