We found 16 dictionaries that define the word one of these days:

General (12 matching dictionaries)

1. one of these days: Merriam-Webster
2. one of these days, one of these days: Oxford Learner's Dictionaries
3. one of these days: Collins English Dictionary
4. one of these days: Cambridge Advanced Learner's Dictionary
5. one of these days: Wiktionary
6. One of these days: Dictionary.com
7. One of These Days (Emmylou Harris song), One of These Days (Marcus Hummon song), One of These Days (Pink Floyd song), One of These Days (instrumental), One of These Days, One of these days: Wikipedia, the Free Encyclopedia
8. one of these days: Rhymezone
9. one of these days: FreeDictionary.org
10. one of these days: TheFreeDictionary.com

Business (1 matching dictionary)

11. one of these days: Legal dictionary

Computing (1 matching dictionary)

12. one of these days: Encyclopedia

Medicine (1 matching dictionary)

13. one of these days: Medical dictionary

Miscellaneous (1 matching dictionary)

14. one of these days: Idioms

Definitions from Wiktionary (one of these days) ▸ adverb:  One day, some day (especially in warning of a negative consequence). Similar: sooner or later, eventually, yet, In Time, one day, mañana, tomorrow, sometime, if, as and when, any time now, more... Opposite: today, now, soon, immediately Types: tomorrow, someday, later, one day, in future, more... ▸ Words similar to one of these days ▸ Usage examples for one of these days ▸ Idioms related to one of these days ▸ Wikipedia articles (New!) ▸ Words that often appear near one of these days ▸ Rhymes of one of these days ▸ Invented words related to one of these days