SUBSTANTIATION Meaning of SUBSTANTIATION in English substantiation BrE AmE səb ˌstæn t ʃ i ˈeɪʃ ə n § \ sʌb-, -ˌstɑːn t ʃ-, -ˌstæn t s- Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012