| n. | 1. | The act or process of inactivating. |
| Noun | 1. | inactivation - the process of rendering inactive; "the gene inactivation system"; "thermal inactivation of serum samples" Antonyms: activation - stimulation of activity in an organism or chemical |
| 2. | inactivation - breaking up a military unit (by transfers or discharges) Synonyms: deactivation |