Definitions
Wiktionary
- adj. shocked and speechless.
- v. Simple past tense and past participle of dumbfound.
GNU Webster's 1913
- adj. same as astounded.
- adj. astonished and confounded.
WordNet 3.0
- adj. as if struck dumb with astonishment and surprise
Examples
“Callum had stepped back, blinking rapidly, his expression dumbfounded.”
“So, needless to say I was again dumbfounded by yet another ridiculous event in this whole debacle.”
Car Stereo Company Tries To Install GPS, Causes $12,398.54 Damage To Your Car - The Consumerist
“Mickey turned and looked at Jackie in dumbfounded amazement.”
“You are going to see Mr. Solovyov?" the old doorman said, his lower lip dangling in dumbfounded trepidation.”
“(recall the dumbfounded look and continuing to read a children's book).”
“Jenna Jameson, a former adult star and current owner of her own studio, told Radar. com that she was "dumbfounded" by the lack of condom use on sets:”
The Huffington Post: Kellee Terrell: Why the Porn Industry's HIV Problem Is Our Problem, Too
“I think people were kind of dumbfounded because they've been waiting so long.”
“At the time I was kind of dumbfounded by this decision.”
“Gerard Arpey, the chairman and chief executive of AMR Corp. 's American Airlines, said at an FAA conference last week that he was "dumbfounded" that the stimulus bill didn't provide financial help to install new aircraft equipment.”
The Wall Street Journal: Airlines Fight Cost Of Safety Measure
“The people who reported the problem to the AP were "dumbfounded" when they were routed to random people's accounts.”
AT&T Randomly Logs You Into Someone Else's Facebook Account - The Consumerist
Lists
These user-created lists contain the word ‘dumbfounded’.
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Words sung by: Belle and Sebastian
beguiling, herbaceous, peninsula, suffragette, damascan, hastening, berserk, overtime, leccy, bestow, swathe, arab strap and 193 more...
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Lesson 9
dumbfounded, ensue, era, flourish, garrison, grievous', hoard, inundate, invincible, nomad, placate, principal and 3 more...
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Confused/Surprised Words
Words that describe being in this state are quite simply wonderful.
astonished, flabbergasted, bamboozled, thunderstruck, dumbstruck, perplexed, addlepated, bewildered, dumbfounded, perturbed, befuddled, confounded
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The Sog Collection
My big word list.
chaos, flaccid, empirical, flotsam, cacophony, grumble, assuage, awe, romance, mortality, coalesce, fortuitous and 3282 more...
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newGRE
mostly from magoosh
imbue, verge on, nonchalant, deliberate, timorous, futile, provisional, dissect, checked, tinged, alluring, visionary and 1046 more...
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Words that delight me
tepid, perfunctory, trope, benign, inordinate, bewildering, ersatz, boon, delectable, apt, scuttlebutt, sequester and 398 more...
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NTDW1
template, modal, sublingual, tandem, polycentric, septuagenarian, token, irrevocable, denotive, augural, aberrant, phlebotomy and 1188 more...
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Just 'cause I like 'em, D
dodecahedron, din, diglyceride, dysphotopsia, decoction, deboss, diatonic, dithyramb, divagate, discalced, dishdasha, daft and 281 more...
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Word Gems
foist, coercion, abecedism, abiectic, abigeus, abiogenesis, ablaut, thunderstruck, dumbfounded, flabbergasted, filagree, blotto and 196 more...
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sionnach's Words
contumely, fomite, holmgang, poltroon, eleemosynary, obsidian, nugatory, grindcore, felch, recrudescent, pyx, parenteral and 3271 more...
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Words of the Day
glabella, chirotony, nook-shotten, crapehanger, filemot, swirlie, egosurf, lexiphanicism, Ruritanian, stichometry, chrononaut, faldstool and 2022 more...
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_mark's list
Words I like!
( personal list, favorite words, randomness )psy, nanobot, success, smack, vibration, microcosmic, springgraph, marksmanship, estranged, homoerotic, flex, fiasco and 1695 more...
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vivek's list
flibbertigibbet, droll, reticence, prelude, erinaceous, brinkmanship, depone, inaniloquent, limerance, pronk, onomatopoeia, oxymoron and 385 more...
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kathquadmum's list
flabbergasted, gobsmacked, perturbed, dumbfounded, astonished, amazed, astounded, bewildered, confused, stunned, upset, at a loss and 13 more...
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Korniko's Words
quixotic, existential, archaic, black, cheap, laser, jungle, tropical, listed, festive, survey, blind and 87 more...
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d is for depressing!
dolorous, damaging, depressing, drab, dull, dumb, derelict, decaying, dubious, doubtful, dreadful, dangerous and 86 more...
Tweets
Looking for tweets for dumbfounded.

Prolagus
(Stop, look and listen, by Belle and Sebastian) Nov 9, 2010
mollusque Why is that one can be dumbfounded, dumbstruck or thunderstruck, but not thunderfounded? Feb 15, 2009