1. to make inactive: to deactivate a chemical. 2. to demobilize or disband (a military unit). 3. to render (a bomb or shell) inoperative. 4. to lose radioactivity. de•ac`ti•va′tion, n. de•ac′ti•va`tor, n.

DEACTIVATED definition: 1. past simple and past participle of deactivate 2. to cause something to be no longer active or…. Learn more.

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. , de·ac·ti·vat·ed, de·ac·ti·vat·ing.

From Longman Dictionary of Contemporary English de‧ac‧ti‧vate /diːˈæktɪveɪt/ verb [transitive] to switch something off, especially a piece of equipment, or to stop it from being used anymore OPP activate You need to type in a code number to deactivate the alarm. → See Verb table Examples from the...