DUMBFOUNDED Meaning of DUMBFOUNDED in English adjectiveEXAMPLES FROM OTHER ENTRIES▪He was dumbfounded when Ryskamp didn't apologize. EXAMPLES FROM CORPUS▪He turned to me in dumbfounded fury. Longman DOCE5 Extras English vocabulary. Дополнительный английский словарь Longman DOCE5. 2012