We found 15 dictionaries that define the word couldn't:

General (13 matching dictionaries)

1. couldn't: Merriam-Webster
2. couldn't: Oxford Learner's Dictionaries
3. couldn't: American Heritage Dictionary of the English Language
4. couldn't, couldn't: Collins English Dictionary
5. Couldn't, Couldnt, Couldnt, could'nt, couldn�t, couldn''t, couldn't, couldnt, couldnt, couldnt: Wordnik
6. couldn't: Cambridge Advanced Learner's Dictionary
7. couldn't, couldnt: Wiktionary
8. couldn't: Webster's New World College Dictionary, 4th Ed.
9. couldn't: The Wordsmyth English Dictionary-Thesaurus
10. couldn't, couldnt: Dictionary.com
11. couldnt: Cambridge Essential American English Dictionary
12. couldn't: TheFreeDictionary.com
13. couldnt: Wordnik

Miscellaneous (1 matching dictionary)

14. couldn't: Idioms

Slang (1 matching dictionary)

15. couldn't: Urban Dictionary

Definitions from Wiktionary (couldn't) ▸ verb:  could not (negative auxiliary) Opposite: could, able Phrases: couldnt help, couldnt bear, couldnt wait, couldnt care less, couldnt be doing, more... ▸ Words similar to couldn't ▸ Usage examples for couldn't ▸ Idioms related to couldn't ▸ Wikipedia articles (New!) ▸ Words that often appear near couldn't ▸ Rhymes of couldn't ▸ Invented words related to couldn't