
A prison is a place in which people are physically confined and, usually, deprived of a range of personal
freedoms. Other terms are penitentiary, correctional facility, and jail (or gaol), although in the United States "
jail" and "prison" refer to different subtypes of correctional facility. Prisons are conventionally
institutions which form part of the
criminal justice system of a country, such that imprisonment or incarceration is a legal
penalty that may be imposed by the
state for the commission of a
crime.
A criminal
suspect who has been charged with or is likely to be charged with criminal
offense may be held on
remand in prison if he is denied or unable to meet conditions of
bail, or is unable or unwilling to post bail. A criminal
defendant may also be held in prison while awaiting
trial or a trial
verdict. If found guilty, a defendant will be
convicted and may receive a custodial
sentence requiring imprisonment.
As well as convicted or suspected criminals, prisons may be used for
internment of those not charged with a crime. Prisons may also be used as a tool of
political repression to detain
political prisoners,
prisoners of conscience, and "
enemies of the state", particularly by
authoritarian regimes. In times of
war or conflict,
prisoners of war may also be detained in prisons. A prison system is the organizational arrangement of the provision and operation of prisons, and depending on their nature, may invoke a
corrections system. Although people have been imprisoned throughout history, they have also regularly been able to perform
prison escapes.