SIERRA LEONEAN Meaning of SIERRA LEONEAN in English Sierra Leonean, Sierra Leonian BrE AmE si ˌer ə li ˈəʊn i‿ən ◂ -ˌeər-; ˌsɪər••ˈ•- AmE \ -ˈoʊn-▷ s z Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012