deinstitutionalize Syllabification: (de·in·sti·tu·tion·al·ize)Pronunciation: /dēˌinstəˈt(y)o͞oSHənlˌīz/Definition of deinstitutionalize verb [with object] discharge (a long-term inmate) from an institution such as a mental hospital or prison:the changes aim to deinstitutionalize mentally ill peopleDerivatives deinstitutionalizationPronunciation: /-ˌt(y)o͞oSHənl-əˈzāSHən/ noun deinstitutionalize in other Oxford dictionaries Definition of deinstitutionalize in the British & World English dictionary