IMMATURE Meaning of IMMATURE in English immature BrE AmE ˌɪm ə ˈtjʊə ◂ -ˈtʃʊə, -ˈtjɔː, -ˈtʃɔː AmE \ -ˈtʊ ə r -ˈtʃʊ ə r, -ˈtjʊ ə r ▷ immature|ly li▷ immature|ness nəs nɪs Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012