We found 12 dictionaries that define the word mayn't:

General (11 matching dictionaries)

1. mayn't: Merriam-Webster
2. mayn't: Oxford Learner's Dictionaries
3. mayn't: American Heritage Dictionary of the English Language
4. mayn't, mayn't: Collins English Dictionary
5. Mayn't, mayn't, maynt: Wordnik
6. mayn't: Wiktionary
7. mayn't: Webster's New World College Dictionary, 4th Ed.
8. mayn't: The Wordsmyth English Dictionary-Thesaurus
9. mayn't, maynt: Dictionary.com
10. Mayn't: Wikipedia, the Free Encyclopedia
11. mayn't: TheFreeDictionary.com

Slang (1 matching dictionary)

12. mayn't: Urban Dictionary

Definitions from Wiktionary (mayn't) ▸ verb:  (colloquial, now rare, dated) may not (negative auxiliary) ▸ Words similar to mayn't ▸ Usage examples for mayn't ▸ Idioms related to mayn't ▸ Wikipedia articles (New!) ▸ Words that often appear near mayn't ▸ Rhymes of mayn't ▸ Invented words related to mayn't