DIACHRONIC Meaning of DIACHRONIC in English diachronic BrE AmE ˌda ɪ ‿ə ˈkrɒn ɪk ◂ AmE \ -ˈkrɑːn-▷ diachronic|ally ə l‿i Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012