in loco parentisPronunciation: /ɪn ˌləʊkəʊ pəˈrɛntɪs/Definition of in loco parentis adverb (of a teacher or other adult responsible for children) in the place of a parent:he was used to acting in loco parentisOrigin:Latinin loco parentis in other Oxford dictionaries Definition of in loco parentis in the US English dictionary