1898, noun of action from institutionalize (q.v.).
"to put into institutional life" (usually deprecatory), 1897; see institution. Earlier (1860) it meant "to make into an institution" and "to adjust to life in an institution" (1893). Related: Institutionalized.
"act or process of removing from institutional life," 1967 (disinstitutionalization is attested from 1955), from de- + institutionalization. Related: Deinstitutionalize; deinstitutionalized.
updated on December 13, 2015