We found 16 dictionaries that define the word shouldn't:

General (14 matching dictionaries)

1. shouldn't: Merriam-Webster
2. shouldn't: Oxford Learner's Dictionaries
3. shouldn't: American Heritage Dictionary of the English Language
4. shouldn't, shouldn't: Collins English Dictionary
5. Shouldn't, Shouldnt, Shouldnt, should'nt, shouldn't, shouldnt, shouldnt, shouldnt: Wordnik
6. shouldn't: Cambridge Advanced Learner's Dictionary
7. shouldn't: Wiktionary
8. shouldn't: Webster's New World College Dictionary, 4th Ed.
9. shouldn't: The Wordsmyth English Dictionary-Thesaurus
10. shouldn't, shouldnt: Dictionary.com
11. shouldnt: Cambridge Essential American English Dictionary
12. Shouldn't: Wikipedia, the Free Encyclopedia
13. shouldn't: TheFreeDictionary.com
14. shouldnt: Wordnik

Miscellaneous (1 matching dictionary)

15. shouldn't: Idioms

Slang (1 matching dictionary)

16. Shouldn't: Urban Dictionary

Definitions from Wiktionary (shouldn't) ▸ verb:  Should not (negative auxiliary) ▸ noun:  (informal) Something that should not be done. Phrases: you shouldnt talk, i shouldnt, i shouldnt wonder, more... ▸ Words similar to shouldn't ▸ Usage examples for shouldn't ▸ Idioms related to shouldn't ▸ Wikipedia articles (New!) ▸ Popular adjectives describing shouldn't ▸ Words that often appear near shouldn't ▸ Rhymes of shouldn't ▸ Invented words related to shouldn't