We found 7 dictionaries that define the word swear up and down:

General (4 matching dictionaries)

1. swear up and down: Merriam-Webster
2. swear up and down: Oxford Learner's Dictionaries
3. swear up and down: TheFreeDictionary.com

Business (1 matching dictionary)

4. swear up and down: Legal dictionary

Medicine (1 matching dictionary)

5. swear up and down: Medical dictionary

Miscellaneous (1 matching dictionary)

6. swear up and down: Idioms

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