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[ek-sahy-tey-shuh n, -si-] /ˌɛk saɪˈteɪ ʃən, -sɪ-/
the act of exciting.
the state of being excited.
  1. the application of voltage to an electric device, as an electron-tube circuit, an antenna, or a dynamotor, often for producing a magnetic field in the device.
  2. the voltage applied.
Physics. a process in which a molecule, atom, nucleus, or particle is excited.
Also called drive. Electronics. the varying voltage applied to the control electrode of a vacuum tube.
Origin of excitation
1350-1400; Middle English excitacioun < Late Latin excitātiōn- (stem of excitātiō), equivalent to Latin excitāt(us) (past participle of excitāre; see excite) + -iōn- -ion
Related forms
preexcitation, noun
superexcitation, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for excitation


the act or process of exciting or state of being excited
a means of exciting or cause of excitement
  1. the current in a field coil of a generator, motor, etc, or the magnetizing current in a transformer
  2. (as modifier): an excitation current
the action of a stimulus on an animal or plant organ, inducing it to respond
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for excitation

late 14c., from Old French excitation, from Latin excitationem (nominative excitatio), noun of action from past participle stem of excitare (see excite).

Online Etymology Dictionary, © 2010 Douglas Harper
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excitation in Medicine

excitation ex·ci·ta·tion (ěk'sī-tā'shən)

  1. The act of increasing the rapidity or intensity of the physical or mental processes; stimulation.

  2. The complete, all-or-none response of a nerve or muscle to an adequate stimulus, ordinarily including propagation of excitation along the membranes of the cell or cells involved.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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excitation in Science
The activity produced in an organ, tissue, or cell of the body that is caused by stimulation, especially by a nerve or neuron. Compare inhibition.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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