INTERPENETRATION Meaning of INTERPENETRATION in English interpenetration BrE AmE ˌɪnt ə ˌpen ɪ ˈtreɪʃ ə n -ˌ•ə- AmE \ ˌɪn t̬ ə r-▷ interpenetration|s z Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012