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an instinctive motive;
"profound religious impulses"
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a sudden desire;
"he bought it on an impulse"
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the electrical discharge that travels along a nerve fiber;
"they demonstrated the transmission of impulses from the cortex to the hypothalamus"
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(electronics) a sharp transient wave in the normal electrical state (or a series of such transients);
"the pulsations seemed to be coming from a star"
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the act of applying force suddenly;
"the impulse knocked him over"
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an impelling force or strength;
"the car's momentum carried it off the road"