verb (used with object), inactivated, inactivating.
to make inactive: The bomb was inactivated.
Immunology. to stop the activity of (certain biological substances).

1905–10; inactive + -ate1

inactivation, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
inactivate (ɪnˈæktɪˌveɪt)
(tr) to render inactive

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

inactivate in·ac·ti·vate (ĭn-āk'tə-vāt')
v. in·ac·ti·vat·ed, in·ac·ti·vat·ing, in·ac·ti·vates

  1. To render nonfunctional.

  2. To make quiescent.

in·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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Example sentences for inactivation
Rendering practices and inactivation of transmissible spongiform encephalopathy agents.
Inactivation of one allele of some tumor suppressor genes is sufficient to cause tumors.
There she underwent an availability preparing her for inactivation.
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