jail-n; 2 Senses

Sense Number 1: place of confinement, prison

Commentary: JAIL[+entity][+artifact][+building][+incarceration]

Mary went down to the county jail to pay John's bail for his release.
The film describes the harsh living conditions in a Mexican jail.
The town jail has a general holding cell and four private cells.

WordNet 3.0 Sense Numbers: 1

Sense Number 2: state of confinement, imprisonment

Commentary: JAIL[+state][+physical][+confinement][+punishment][+official]
NOTE: entails being in a Sense 1 jail, but refers to the state of confinement of an individual, rather than the building itself.

She was sentenced to three months' jail.
The judge sentenced him to jail without parole.

WordNet 0.0 Sense Numbers: 2