- 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.
- Physical Chemistry. to lose radioactivity.
Origin of deactivate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for 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
Word Origin and History for deactivate
Online Etymology Dictionary, © 2010 Douglas Harper