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  1. stim·u·lant
    IPA[ˈstimyələnt]
  2. noun

    adjective

    • 1. raising levels of physiological or nervous activity in the body:

      caffeine has stimulant effects on the heart
  3. Variation

    • n.: noun: stimulant, plural noun: stimulants

    • noun

      a substance that raises levels of physiological or nervous activity in the body:

      something that increases activity, interest, or enthusiasm in a specified field:

    • adjective

      raising levels of physiological or nervous activity in the body:
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