- A building for the confinement of persons held in lawful custody, especially for minor offenses or as a preliminary to trial or punishment.
- A state of confinement or captivity.
- A prison.
Middle english: from old french jaille, gaiole, from latin caveola, diminutive of cavea "cage".
- He was sentenced to a year in jail.
- The jail was overcrowded.
- The jail had poor conditions.
- He was arrested and taken to jail.
- He was released from jail on bail.