IPA: /dʒeɪl/
KK: /dʒeɪl/
A place where people are kept as a punishment for a crime or while they are waiting for their trial, especially in British English.
The thief was sent to gaol for six months after his trial.
Gaol originates from Old French *gaole* (meaning a cage or prison), which in turn comes from the Latin *cavea* (meaning a cage or enclosure). The word 'gaol' refers to a place of confinement or imprisonment.
Think of a 'cage' ('cavea') where someone is kept confined — that's why 'gaol' means a place of imprisonment.