from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An impelling force; an impetus.
- n. The motion produced by such a force.
- n. A sudden wish or urge that prompts an unpremeditated act or feeling; an abrupt inclination: had an impulse to run away; an impulse of regret that made me hesitate; bought a hat on impulse.
- n. A motivating force or tendency: "Respect for the liberty of others is not a natural impulse in most men” ( Bertrand Russell).
- n. Electronics A surge of electrical power in one direction.
- n. Physics 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.
- n. Physiology 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.
- adj. Characterized by impulsiveness or acting on impulse: an impulse shopper; impulse buying.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A thrust; a push; a sudden force that impels.
- n. A wish or urge, particularly a sudden one prompting action.
- n. The integral of force over time.
- v. To impel; to incite.
from the GNU version of the Collaborative International Dictionary of English
- n. The act of impelling, or driving onward with sudden force; impulsion; especially, force so communicated as to produced motion suddenly, or immediately.
- n. The effect of an impelling force; motion produced by a sudden or momentary force.
- n. The action of a force during a very small interval of time; the effect of such action.
- n. A mental force which simply and directly urges to action; hasty inclination; sudden motive; momentary or transient influence of appetite or passion; propension; incitement
- transitive v. To impel; to incite.
from The Century Dictionary and Cyclopedia
- n. Force communicated suddenly; the effect of an impelling force; a thrust; a push.
- n. Specifically In mech.: An infinite force or action enduring for an infinitely short time, so as to produce a finite momentum.
- n. The resultant of all such forces acting on a body at any instant, resolved into a couple and a force along the axis of that couple.
- n. The momentum produced by a force in any time.
- n. A stimulation of the mind to action; the impelling force of appetite, desire, aversion, or other emotion; especially, a sudden disposition to perform some act which is not the result of reflection; sudden determination.
- n. Any communication of force; any compelling action; instigation.
- n. A mental impression; an idea.
- n. Shock; onset.
- To give an impulse to; incite; instigate.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the electrical discharge that travels along a nerve fiber
- n. an impelling force or strength
- n. an instinctive motive
- n. (electronics) a sharp transient wave in the normal electrical state (or a series of such transients)
- n. the act of applying force suddenly
- n. a sudden desire
Latin impulsus, from past participle of impellere, to impel; see impel.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin impulsus. (Wiktionary)