An institution for the care and education of destitute or delinquent children.
The word was used in the names of several institutions of this kind founded and run by the Roman Catholic Church in the United States..
Origin
Mid 19th century; earliest use found in The New York Times. From classical Latin prōtect-, past participial stem of prōtegereprotect + -ory, probably after refectory, reformatory, etc.