WordWeb Online

1. (law) putting someone in prison or in jail as lawful punishment
    
2. The state of being imprisoned
   "the imprisonment of captured soldiers";
   - captivity, incarceration, immurement
    
3. The act of confining someone in a prison (or as if in a prison)
   - internment

Derived forms: imprisonments

Type of: confinement, penalisation [Brit], penalization, penalty, punishment, sanction

Encyclopedia: Imprisonment