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1. An impelling force; an impetus. 2. The motion produced by such a force. 3. had an impulse to run away; an impulse of regret that made me hesitate; bought a hat on impulse. 4. Bertrand Russell 5. A surge of electrical power in one direction. 6. The product obtained by multiplying the average value of a force by the time during which it acts. The impulse equals the change in momentum produced by the force in this time interval. 7. The electrochemical transmission of a signal along a nerve fiber that produces an excitatory or inhibitory response at a target tissue, such as a muscle or another nerve. 8. an impulse shopper; impulse buying.
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