REFORMATORY Meaning of REFORMATORY in English re ‧ for ‧ ma ‧ to ‧ ry /rɪˈfɔːmət ə ri $ rɪˈfɔːrmətɔːri/ BrE AmE noun ( plural reformatories ) [countable] American English old use a ↑ reform school Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012