impulse - definition and synonyms


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  1. 1
    [countable/uncountable] a sudden strong feeling that you must do something
    an impulse to do something:

    Jenny felt a sudden impulse to play some music.

    control/resist an impulse:

    She struggled to resist the impulse to laugh.

    on (an) impulse (=because you suddenly feel that you want to):

    He saw them get into the car and on an impulse he followed them.

    act on impulse:

    Acting on impulse, he knocked on her door.

    1. b.
      [only before noun] an impulse buy is something that you buy because you see it and want it
  2. 2
    [countable] physics an electrical signal, for example one that is passed from a nerve to a muscle