im·pulse /ˈɪmˌpʌls, ɪmˈ/
im·pulse /ˈɪmˌpəls/ 名詞
1. The act of impelling, or driving onward with sudden force; impulsion; especially, force so communicated as to produced motion suddenly, or immediately.
All spontaneous animal motion is performed by mechanical impulse. --S. Clarke.
2. The effect of an impelling force; motion produced by a sudden or momentary force.
3. Mech. The action of a force during a very small interval of time; the effect of such action; as, the impulse of a sudden blow upon a hard elastic body.
4. A mental force which simply and directly urges to action; hasty inclination; sudden motive; momentary or transient influence of appetite or passion; propension; incitement; as, a man of good impulses; passion often gives a violent impulse to the will; to buy something on impulse.
These were my natural impulses for the undertaking. --Dryden.
Syn: -- Force; incentive; influence; motive; feeling; incitement; instigation.
Im·pulse v. t. To impel; to incite. [Obs.]
n 1: an instinctive motive; "profound religious impulses" [syn: urge]
2: a sudden desire; "he bought it on an impulse" [syn: caprice,
3: the electrical discharge that travels along a nerve fiber;
"they demonstrated the transmission of impulses from the
cortex to the hypothalamus" [syn: nerve 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" [syn: pulsation,
5: the act of applying force suddenly; "the impulse knocked him
over" [syn: impulsion, impetus]
6: an impelling force or strength; "the car's momentum carried
it off the road" [syn: momentum]