We found 5 dictionaries that define the word the whys and wherefores:

General (4 matching dictionaries)

1. the whys and (the) wherefores, the whys and wherefores: Merriam-Webster
2. the whys and (the) wherefores: Cambridge Advanced Learner's Dictionary

Miscellaneous (1 matching dictionary)

3. the whys and wherefores: Idioms

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