/ ˈstɪmjələnt; NAmE / noun
1.
a drug or substance that makes you feel more awake and gives you more energy :
Coffee and tea are mild stimulants.
2.
stimulant (to sth) an event or activity that encourages more activity
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WORD ORIGIN
early 18th cent.: from Latin stimulant- urging, goading, from the verb stimulare .