Peter Pan Syllabification: (Pe·ter Pan)Pronunciation: /ˌpētər ˈpan/Definition of Peter Pan the hero of J. M. Barrie’s play of the same name (1904), a boy with magical powers who never grew up. (as noun a Peter Pan) a person, especially a male who retains youthful features, or who is immature. Peter Pan in other Oxford dictionaries Definition of Peter Pan in the British & World English dictionary