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Meaning:
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a sudden desire to act without thought about the consequences; a short increase in strength, force

drive, resolve

desire feeling inclination influence instinct motivation motive notion passion thought whim wish actuation appeal bent caprice catalyst disposition excitant extemporization fancy flash goad hunch impulsion incitation incitement inspiration itch lash lust mind spontaneity spur urge vagary whimsy yen impellent
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Cases of word usage

1) (of a person, behaviour) acting on, resulting from an impulse (impulsive)

IMPULSE as in Wiktionary
IMPULSE as in Wikipedia