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English definition of “impulse”

impulse

noun     /ˈɪmpʌls/
FEELING [C] a sudden feeling that you must do something, without thinking about the results: [usually singular] Her first impulse was to run away.Motives and reasonsFeelings of desire
on impulse suddenly and without thinking first: I tend to act on impulse.Motives and reasons
SIGNAL [C] a short signal that carries information through a system, for example an electrical system or the nerves in your bodyElectricity and electronicsCommunications technology - general words
(Definition of impulse noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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