verb (used with object), in·ac·ti·vat·ed, in·ac·ti·vat·ing.

to make inactive: The bomb was inactivated.
Immunology. to stop the activity of (certain biological substances).

Origin of inactivate

First recorded in 1905–10; inactive + -ate1
Related formsin·ac·ti·va·tion, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for inactivate

Historical Examples of inactivate

British Dictionary definitions for inactivate



(tr) to render inactive
Derived Formsinactivation, 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

inactivate in Medicine




To render nonfunctional.
To make quiescent.
Related formsin•ac′ti•vation n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.