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, esp. 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.

verb

demilitarize , disband , make inactive , shut down , shut off