imprisonment

n. confinement, incarceration, keeping in prison

A prison, penitentiary, or correctional facility is a place in which individuals are physically confined or interned and usually deprived of a range of personal freedoms. 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.
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Noun
1. putting someone in prison or in jail as lawful punishment
(hypernym) punishment, penalty, penalization, penalisation
(derivation) imprison, incarcerate, lag, immure, put behind bars, jail, jug, gaol, put away, remand
(classification) law, jurisprudence
2. the state of being imprisoned; "he was held in captivity until he died"; "the imprisonment of captured soldiers"; "his ignominious incarceration in the local jail"; "he practiced the immurement of his enemies in the castle dungeon"
(synonym) captivity, incarceration, immurement
(hypernym) confinement
(hyponym) durance
(derivation) imprison
3. the act of confining someone in a prison (or as if in a prison)
(synonym) internment
(hypernym) confinement
(hyponym) lockdown
(derivation) imprison, incarcerate, lag, immure, put behind bars, jail, jug, gaol, put away, remand

A penalty imposed by a court under which the individual is confined to an institution, 18 USC

Synonyms and related words:
beleaguerment, besetment, blockade, blockading, captivity, circumscription, close arrest, confinement, cordoning, custody, detention, dismemberment, durance, durance vile, duress, enclosure, envelopment, estrapade, galleys, hard labor, house arrest, immuration, immurement, impalement, incarceration, inclusion, internment, jailing, keelhauling, martyrdom, penal servitude, picketing, quarantine, railriding, remand, rock pile, siege, strappado, tar-and-feathering, term of imprisonment, the gantlet, torment, torture