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