on-line Pronunciation: /ˈɑːnˈlaɪn; ˌɒnˈlaɪn/Translate on-line | into French | into Italian Spanish translation of on-lineadj [Comput] en línea on banking = banca en líneaon-line in other Oxford dictionaries Definition of on-line in the British & World English dictionary Definition of on-line in the US English dictionary