UNPRECEDENTED Meaning of UNPRECEDENTED in English unprecedented BrE AmE ʌn ˈpres ɪ dent ɪd ⇨ʌm-, ˌ•-, -ˈpriːs-, -ˈ•ə-, -ɪd ə nt-, -əd ə nt-, -əd; •ˌ••ˈdent•, ˌ•ˌ•- AmE \ -ˈpres ə den t̬ əd▷ unprecedented|ly li Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012