SUBSTITUTION Meaning of SUBSTITUTION in English substitution BrE AmE ˌsʌb stɪ ˈtjuːʃ ə n -stə-, ⇨-ˈtʃuːʃ- AmE \ -ˈtuːʃ- -ˈtjuːʃ- ▷ substitution|s z Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012