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  1.                 From WordNet dictionary, version 3.0:
                

    
                
                  
    impulse
n. 1. an instinctive motive; "profound religious impulses"
Synonyms: urge
2. a sudden desire; "he bought it on an impulse"
Synonyms: caprice, whim
3. the electrical discharge that travels along a nerve fiber; "they demonstrated the transmission of impulses from the cortex to the hypothalamus"
Synonyms: nerve impulse, nervous impulse, neural impulse
4. (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"
Synonyms: pulsation, pulsing, pulse
5. the act of applying force suddenly; "the impulse knocked him over"
Synonyms: impulsion, impetus
6. an impelling force or strength; "the car's momentum carried it off the road"
Synonyms: momentum

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