n. 25B6; noun
she had an impulse to run and hide : URGE, instinct, drive, compulsion, itch; whim, desire, fancy, notion.
a man of impulse : SPONTANEITY, impetuosity, recklessness, rashness.
passions provide the main impulse of poetry : INSPIRATION, stimulation, stimulus, incitement, motivation, encouragement, spur, catalyst.
impulses from the spinal cord to the muscles : PULSE, current, wave, signal.
25A0; on (an) impulse IMPULSIVELY, spontaneously, on the spur of the moment, without forethought, without premeditation.