Русско-англо-русский юридический словарь

gaol, jail, jailhouse, pokey, poky, slammer, clink - a correctional institution used to detain persons who are in the lawful custody of the government (either accused persons awaiting trial or convicted persons serving a sentence) (The Free Dictionary by Farlex)

One important means of staying connected to a person in a correctional institution is prison visitation. Studies indicate that visitation is the least frequent form of contact between the incarcerated and outsiders (phone calls and the exchange of letters is more common), but visitation is nonetheless a significant aspect of incarceration. (Oxford Bibliographies)