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impulse

im·pulse / ˈimˌpəls/ • n. 1. a sudden strong and unreflective urge or desire to act: I had an almost irresistible impulse to giggle | [as adj.] impulse buying. ∎  the tendency to act in this way: he was a man of impulse, not premeditation. 2. a driving or motivating force; an impetus: an added impulse to this process of renewal. 3. a pulse of electrical energy; a brief current: nerve impulses | a spiral is used to convert radio waves into electrical impulses. 4. Physics a force acting briefly on a body and producing a finite change of momentum. ∎  a change of momentum so produced, equivalent to the average value of the force multiplied by the time during which it acts. PHRASES: on impulse (or on an impulse) suddenly and without forethought; impulsively.

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"impulse." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 22 Aug. 2017 <http://www.encyclopedia.com>.

"impulse." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (August 22, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/impulse-0

"impulse." The Oxford Pocket Dictionary of Current English. . Retrieved August 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/impulse-0

impulse

impulse (nerve impulse) The signal that travels along the length of a nerve fibre and is the means by which information is transmitted through the nervous system. It is marked by the flow of ions across the membrane of the axon caused by changes in the permeability of the membrane, producing a reduction in potential difference that can be detected as the action potential. The strength of the impulse produced in any nerve fibre is constant (see all-or-none response).

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"impulse." A Dictionary of Biology. . Encyclopedia.com. 22 Aug. 2017 <http://www.encyclopedia.com>.

"impulse." A Dictionary of Biology. . Encyclopedia.com. (August 22, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/impulse

"impulse." A Dictionary of Biology. . Retrieved August 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/impulse

impulse

impulse act of impelling; stimulation of the mind. XVII. — L. impulsus, f. pp. stem of impellere IMPEL; cf. PULSE1.
So impulsive impelling to action XVI; actuated by impulse XIX. — (O)F. impulsif, -ive or late L. impulsīvus.

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"impulse." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. 22 Aug. 2017 <http://www.encyclopedia.com>.

"impulse." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. (August 22, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/impulse-1

"impulse." The Concise Oxford Dictionary of English Etymology. . Retrieved August 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/impulse-1

impulse

impulse (im-puls) n. (in neurology) see nerve impulse.

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"impulse." A Dictionary of Nursing. . Encyclopedia.com. 22 Aug. 2017 <http://www.encyclopedia.com>.

"impulse." A Dictionary of Nursing. . Encyclopedia.com. (August 22, 2017). http://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/impulse

"impulse." A Dictionary of Nursing. . Retrieved August 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/impulse

impulse

impulse, in mechanics: see momentum.

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"impulse." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 22 Aug. 2017 <http://www.encyclopedia.com>.

"impulse." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (August 22, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/impulse

"impulse." The Columbia Encyclopedia, 6th ed.. . Retrieved August 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/impulse

impulse

impulse •Hals • rinkhals • valse • else • grilse •false, waltz •convulse, dulse, pulse •impulse

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"impulse." Oxford Dictionary of Rhymes. . Encyclopedia.com. 22 Aug. 2017 <http://www.encyclopedia.com>.

"impulse." Oxford Dictionary of Rhymes. . Encyclopedia.com. (August 22, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/impulse

"impulse." Oxford Dictionary of Rhymes. . Retrieved August 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/impulse