verb (used with object)
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)
Physical Chemistry. to lose radioactivity.