AUTHORITATIVE Meaning of AUTHORITATIVE in English authoritative BrE AmE ɔː ˈθɒr ɪt ət ɪv -ˌ•ət-; -ɪ teɪt ɪv, -ə•• AmE \ ə ˈθɔːr ə teɪt̬ ɪv ɔː-, ɑː- ▷ authoritative|ly li▷ authoritative|ness nəs nɪs Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012