• Webster's Revised Unabridged Dictionary
    • v. t dumfounder To dumfound; to confound.
    • ***
Century Dictionary and Cyclopedia
    • dumfounder Same as dumfound.
    • ***
Chambers's Twentieth Century Dictionary
    • vs.t Dumfounder to strike dumb: to confuse greatly: to astonish
    • ***


Chambers's Twentieth Century Dictionary
A.S. dumb; Ger. dumm, stupid, Dut. dom.


In literature:

I was dumfounded at his solemnity, at the responsibility he was putting upon me.
"Land of the Burnt Thigh" by Edith Eudora Kohl
Everybody was dumfounded but the High School boys, who waved their purple and white flags and shrieked themselves hoarse.
"Golden Days for Boys and Girls" by Various
At this time of his life he was about thirty; and as to the outside world, he was absolutely dumfounded by the catastrophe.
"An Old Man's Love" by Anthony Trollope
In that moment, however, while he outwardly seemed so inactive and dumfounded his brain was working swiftly.
"Frank Merriwell's Son" by Burt L. Standish
The Confederate was astonished, almost dumfounded, for he had calculated that such a youthful commander would be "easy meat" for him.
"An Undivided Union" by Oliver Optic
He was dazzled, dumfounded!
"Skippy Bedelle" by Owen Johnson
For his part, Jack stood dumfounded and quaking, the picture of a coward with a guilty conscience.
"Blackbeard: Buccaneer" by Ralph D. Paine
The old man was evidently disconcerted and angry at being found, while the boy was utterly dumfounded.
"The Transformation of Job" by Frederick Vining Fisher
Varvara Pavlovna was perfectly dumfounded by this kiss.
"A Nobleman's Nest" by Ivan Turgenieff
For once he was too dumfounded to reply.
"The Fire People" by Ray Cummings

In poetry:

Dumfounder'd was he, nae sigh did he gie,
He mounted his mare - he rade cannily;
An' aften he thought, as he gaed through the glen,
She's daft to refuse the Laird o' Cockpen.
"The Laird of Cockpen" by Carolina Oliphant

In news:

The experience was said to render patients dumfounded, shuffling and mumbling like a Frankenstein without a tap-dancing routine.
So I was dumfounded — I even lost a bet — to discover in Florida that the American cowboy originated down here.