definition of
dumfounded

[1] #1 dumfounded s. [dumbfounded, flabbergasted, stupefied, thunderstruck, dumbstruck, dumbstricken] as if struck dumb with astonishment and surprise; "a circle of policement stood dumbfounded by her denial of having seen the accident"; "the flabbergasted aldermen were speechless"; "was thunderstruck by the news of his promotion". wn