SIERRA Meaning of SIERRA in English sierra, S~ BrE AmE si ˈer ə -ˈeər-; ˈsɪər ə —Spanish [ ˈsje ɾɾa \] ▷ sierra|s z —see also phrases with this word▶ Si ˌ erra Ne ˈ vada BrE AmE Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012