<p><strong>Adjective</strong></p><ul><li>Serving or designed to reform:<ul><li>Reformatory punishments</li><li>Reformatory lectures</li></ul></li></ul><p><strong>Noun</strong></p><ul><li>(Plural: reformatories) Also called reform school:<ul><li>A penal institution for reforming young offenders, especially minors</li><li>Juvenile detention center</li></ul></li></ul>