WordWeb Online

1. The process of rendering inactive
   "the gene inactivation system"; "thermal inactivation of serum samples"
    
2. (military) breaking up a military unit (by transfers or discharges)
   - deactivation

Derived forms: inactivations

Type of: action, activity, chuck [Brit, informal], discharge, dismissal, dismission, firing, heave-ho [informal], liberation, natural action, natural process, release, sack, sacking, severance, the axe [informal], the boot [informal], the chop [Brit, informal]

Antonym: activation

Encyclopedia: Inactivation