Longman Dictionary of Contemporary English
The Collaborative International Dictionary
dumbfounded \dumbfounded\ adj.
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same as astounded.
Syn: amazed, astonied, astonished, astounded, flabbergasted, stunned, stupefied, thunderstruck.
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astonished and confounded.
Syn: amazed, dumfounded.
Douglas Harper's Etymology Dictionary
past participle adjective from dumbfound.
Wiktionary
shocked and speechless. alt. shocked and speechless. v
(en-past of: dumbfound)
WordNet
adj. 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" [syn: dumfounded, flabbergasted, stupefied, thunderstruck]
Usage examples of "dumbfounded".
There was a moment of dumbfounded silence as that fact was absorbed and then B'nurrin ducked away before the wrath of his peers could descend on him.
The dumbfounded stare of the gray dwarf told Bruenor beyond any doubt that the ploy was over.
She hadn't meant to speak it aloud, but so dumbfounded was she by Wulfgar's distant reference to Drizzt that the words just slipped out.
He landed nimbly on his feet on the parapet within, right between two dumbfounded guards, neither of them holding a weapon as they tried to keep their hands warm.
Ivan whispered to the two elves, who were standing dumbfounded, their mouths hanging open.
I stared at him dumbfounded as he opened up his paper and began to study the runners at Happy Valley.
He stared at her, dumbfounded, as she told him what she thought had happened to her, what she had decided to do, how she had hidden the horror ever since.
A moment of silence then Tyrer and McFay were dumbfounded to see the officer suddenly lose his temper and begin raving at them.
He smiled back, liking what he saw, still dumbfounded by her arrival, and courage making such a formidable journey alone.
Twisting his head slightly, he looked at Cerro, still standing dumbfounded, and called back, "Oh, yeah.
The adult owoc would simply stare, apparently dumbfounded, and then amble away.
More than anything else, it was the dumbfounded expression on his face when she told Julius that the owoc were now insisting that Kupu had to come along.
As the dumbfounded sailors watched, it glided silently offinto the mist.