CIRCUMVALLATION Meaning of CIRCUMVALLATION in English circumvallation BrE AmE ˌsɜːk əm və ˈleɪʃ ə n -væˈ•- AmE \ ˌsɝːk-▷ circumvallation|s z Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012