One who is confined in a prison.
- A person held in custody, captivity, or a condition of forcible restraint, especially while on trial or serving a prison sentence.
- One deprived of freedom of expression or action: "He was a prisoner of his own personality—of that given set of traits that . . . predisposed him to see the world in a certain way, to make certain moves, certain choices” ( William H. Hallahan).