Английский разговорный словарь (основной) - impulse

ˈɪmpʌls n. 1 the act or an instance of impelling; a push. 2 an impetus. 3 Physics a an indefinitely large force acting for a very short time but producing a finite change of momentum (e.g. the blow of a hammer). b the change of momentum produced by this or any force. 4 a wave of excitation in a nerve. 5 mental incitement. 6 a sudden desire or tendency to act without reflection (did it on impulse). øimpulse buying the unpremeditated buying of goods as a result of a whim or impulse. [L impulsus (as IMPEL)]