Dictionary

A place or institution of confinement, especially of long-term confinement for those convicted of serious crimes or otherwise considered undesirable by the government.

Example: The cold stone walls of the prison had stood for over a century.

Confinement in prison.

Example: Prison was a harrowing experience for him.

Any restrictive environment, such as a harsh academy or home.

Example: The academy was a prison for many of its students because of its strict teachers.

To imprison.