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[ree-ak-tuh-veyt] /riˈæk təˌveɪt/
verb (used with object), reactivated, reactivating.
to render active again; revive.
verb (used without object), reactivated, reactivating.
to be active again.
Origin of reactivate
First recorded in 1900-05; re- + activate
Related forms
reactivation, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for reactivate
Historical Examples
  • If Venex 17's head had been severed for less than three weeks he could reactivate it.

    The Velvet Glove Harry Harrison
  • My thought then, as I explained to Fles, was to reactivate the factory and sell my product to the sightseers.

British Dictionary definitions for reactivate


(transitive) to make (something) active or functional again
Derived Forms
reactivation, noun
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 reactivate

1902, from re- "back, again" + activate. Related: Reactivated; reactivating; reactivation.

Online Etymology Dictionary, © 2010 Douglas Harper
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reactivate in Medicine

reactivate re·ac·ti·vate (rē-āk'tə-vāt')
v. re·ac·ti·vat·ed, re·ac·ti·vat·ing, re·ac·ti·vates

  1. To make active again.

  2. To restore the ability to function or the effectiveness of.

re·ac'ti·va'tion n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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