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English definition of “impulse”

impulse

noun [C/U] (DESIRE)   /ˈɪm·pʌls/
a sudden, strong desire to do something: [+ to infinitive] I had this impulse to dye my hair red. If you do something on impulse, you do it because you suddenly want to: [U] I bought this expensive sweater on impulse.
(Definition of impulse noun (DESIRE) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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