in loco parentis

Từ điển Oxford Advanced Learner 8th

in loco par·en·tis BrE [ɪn ˌləʊkəʊ pəˈrentɪs] NAmE [ɪn ˌloʊkoʊ pəˈrentɪs] adverb (from Latin, formal)
having the same responsibility for a child as a parent has
•The staff have a position of trust; they stand in loco parentis to all the children for whom they are responsible.

Word Origin:
[in loco parentis] Latin.