EXPONENTIAL Meaning of EXPONENTIAL in English exponential BrE AmE ˌeks pə ˈnen t ʃ ə l ◂ -pəʊ- -poʊ- ▷ exponential|ly i▶ ˌ expo ˌ nential ˈ growth BrE AmE Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012