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[see-zher] /ˈsi ʒər/
the act or an instance of seizing.
the state of being seized.
a taking possession of an item, property, or person legally or by force.
a sudden attack, as of epilepsy or some other disease.
Origin of seizure
1475-85; seize + -ure
Related forms
nonseizure, noun
reseizure, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Examples from the Web for seizure
Contemporary Examples
Historical Examples
  • In fact he affirmed that sometimes one tea-dealer never suffered a seizure in six or seven years.

  • They thought he was about to have a stroke or a seizure of some sort.

    Sundry Accounts Irvin S. Cobb
  • Besides, Père Roque never had any hesitation in making a seizure.

  • She had what the folks call a seizure, and she never spoke again.

    The Birthright Joseph Hocking
  • The seizure of Briseis, his special "mead of honour," is only the last straw, the culminating insult.

    The World of Homer Andrew Lang
British Dictionary definitions for seizure


the act or an instance of seizing or the state of being seized
(pathol) a sudden manifestation or recurrence of a disease, such as an epileptic convulsion
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 seizure

"act of seizing," late 15c., from seize + -ure. Meaning "sudden attack of illness" is attested from 1779.

Online Etymology Dictionary, © 2010 Douglas Harper
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seizure in Medicine

seizure sei·zure (sē'zhər)
A sudden attack, spasm, or convulsion, as in epilepsy.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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seizure in Science
A sudden episode of transient neurologic symptoms such as involuntary muscle movements, sensory disturbances and altered consciousness. A seizure is caused by abnormal electrical activity in the brain, which is often diagnosed on an electroencephalogram. See also epilepsy.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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