impulse Meaning, definition in Cambridge English Dictionary
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Meaning of "impulse" - English Dictionary

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impulsenoun

uk   us   /ˈɪm.pʌls/

impulse noun (WISH)

C2 [C + to infinitive] a sudden strong wish to do something: I had this sudden impulse to shout out "Nonsense!" in the middle of her speech.on (an) impulse C2 because you suddenly want to, although you haven't planned to: "I didn't know you were looking for some new shoes." "Oh, I wasn't - I just bought them on impulse."

impulse noun (SIGNAL)

[C] a short electrical, radio, or light signal that carries information or instructions between the parts of a system: an electrical/nerve impulse

impulse noun (REASON)

[C usually singular] formal something that is the force behind or reason for something else: a creative/commercial impulse
(Definition of impulse from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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