From Longman Dictionary of Contemporary Englishreformatoryre‧for‧ma‧to‧ry /rɪˈfɔːmətəri $ rɪˈfɔːrmətɔːri/ noun (plural reformatories) [countable] American English old use SCJSETa reform school
Examples from the Corpus
reformatory• A few children's homes have been opened but they also double as reformatories for young offenders.• He was sent to a state reformatory at age 11 for knifing a white homosexual attacker. 