We found 19 dictionaries that define the word dumbfounded:

General (16 matching dictionaries)

1. dumbfounded: Merriam-Webster
2. dumbfounded: Collins English Dictionary
3. dumbfounded: Vocabulary.com
4. Dumbfounded, dumbfounded: Wordnik
5. dumbfounded: Cambridge Advanced Learner's Dictionary
6. dumbfounded: Wiktionary
7. dumbfounded: Dictionary.com
8. dumbfounded: Cambridge Essential American English Dictionary
9. Dumbfounded: Wikipedia, the Free Encyclopedia
10. dumbfounded: Rhymezone
11. dumbfounded: FreeDictionary.org
12. dumbfounded: Mnemonic Dictionary
13. dumbfounded: TheFreeDictionary.com
14. dumbfounded: Longman Dictionary of Contemporary English

Business (1 matching dictionary)

15. dumbfounded: Legal dictionary

Science (1 matching dictionary)

16. dumbfounded: Cytokines & Cells Online Pathfinder Encyclopaedia

Slang (1 matching dictionary)

17. dumbfounded: Urban Dictionary

(Note: See dumbfound_or_dumfound as well.)

Definitions from Wiktionary ( ) ▸ adjective:  Shocked and speechless. Similar: stupefied, flabbergasted, thunderstruck, surprised, lost for words, stunned, speechless, dazed, blanked, out on one's feet, more... Opposite: composed, unfazed, unsurprised, collected, calm Phrases: confused dumbfounded look of disgust, dumbfounded expression, consider dumbfounded, look dumbfounded, more... Colors:     gray,     pale blue,     white,     beige,     light gray, more... ▸ Words similar to dumbfounded ▸ Usage examples for dumbfounded ▸ Idioms related to dumbfounded ▸ Wikipedia articles (New!) ▸ Popular nouns described by dumbfounded ▸ Words that often appear near dumbfounded ▸ Rhymes of dumbfounded ▸ Invented words related to dumbfounded