DUMBFOUND Meaning of DUMBFOUND in English dumbfound BrE AmE ( ˌ ) dʌm ˈfaʊnd ˈ•• ▷ dumbfound|ed ɪd əd ▷ dumbfound|ing ɪŋ▷ dumbfound|s z Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012