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Definitions

dumbfounded

[duhm-foun-did, duhm-foun-] / dʌmˈfaʊn dɪd, ˈdʌmˌfaʊn- /
ADJECTIVE
astounded, confused
Synonyms
STRONG
amazed astonished bamboozled beat bewildered buffaloed confounded dismayed flabbergasted floored knocked licked nonplused overcome overwhelmed puzzled shocked staggered startled stuck stumped stunned surprised thrown
WEAK
agape aghast blown-away bowled over breathless dumb speechless taken aback thunderstruck
Antonyms
STRONG
aware
WEAK
expectant unsurprised

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

And though some of the names listed have since been implicated in his crimes, or at least knew about his conviction, many others were dumbfounded to be mentioned at all because they’d never met Epstein.

From The Wall Street Journal • Mar. 20, 2026

American skater Nathan Chen, the Beijing men's individual gold medallist, was dumbfounded, saying: "What a shock".

From Barron's • Feb. 14, 2026

The South Park police force is dumbfounded by the videos, believing they are real.

From Los Angeles Times • Nov. 13, 2025

He said Mr Crocker was "dumbfounded", adding: "He couldn't believe it. He couldn't believe it was so quick, either."

From BBC • Jul. 31, 2025

Oops, I mean: staring dumbfounded at my sculpture.

From "I'll Give You the Sun" by Jandy Nelson

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.