Meaning of impulse
Definition of impulse
a sudden desire; "he bought it on an impulse"
the electrical discharge that travels along a nerve fiber; "they demonstrated the transmission of impulses from the cortex to the hypothalamus"
(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"
the act of applying force suddenly; "the impulse knocked him over"