impulse - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “impulse”

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impulse

noun

impulse noun (DESIRE)

 us   /ˈɪm·pʌls/ [C/U] a sudden, strong desire to do something: [+ to infinitive] I had this impulse to dye my hair red.  us   /ˈɪm·pʌls/ [C/U] If you do something on impulse, you do it because you suddenly want to: [U] I bought this expensive sweater on impulse.

impulse noun (SIGNAL)

 us   /ˈɪm·pʌls/ [C] a short electrical signal that carries information or instructions between the parts of a system: nerve impulses

impulse noun (FORCE)

physics /ˈɪm·pʌls/ [U] the force that is working on an object multiplied by the amount of time it is working
(Definition of impulse from the Cambridge Academic Content Dictionary © Cambridge University Press)
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