We found 12 dictionaries that define the word m day:

General (8 matching dictionaries)

1. M-day: Merriam-Webster
2. M-day: American Heritage Dictionary of the English Language
3. M-day: Wiktionary
4. M-day: Webster's New World College Dictionary, 4th Ed.
5. M-day: Infoplease Dictionary
6. M-day, m day: Dictionary.com
7. M-Day, M-Day (book): Wikipedia, the Free Encyclopedia
8. M-day: TheFreeDictionary.com

Miscellaneous (2 matching dictionaries)

9. M-DAY: Acronym Finder
10. AbbreviationZ (No longer online)

Tech (2 matching dictionaries)

11. DOD Dictionary of Military Terms: Joint Acronyms and Abbreviations (No longer online)
12. DOD Dictionary of Military Terms (No longer online)

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