verb (used with object), de·ac·ti·vat·ed, de·ac·ti·vat·ing.
to cause to be inactive; remove the effectiveness of.
to demobilize or disband (a military unit).
to render (a bomb, shell, or the like) inoperative, especially by disconnecting, removing, or otherwise interfering with the action of the fuze.
Chemistry. to render (a chemical, enzyme, catalyst, etc.) inactive.
verb (used without object), de·ac·ti·vat·ed, de·ac·ti·vat·ing.
Physical Chemistry. to lose radioactivity.
Origin of deactivate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for deactivate
Historical Examples of deactivate
(tr) to make (a bomb, etc) harmless or inoperative
(intr) to become less radioactive
(tr) US to end the active status of (a military unit)
chem to return or cause to return from an activated state to a normal or ground state
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
Online Etymology Dictionary, © 2010 Douglas Harper