We found 13 dictionaries that define the word not to mention:

General (12 matching dictionaries)

1. not to mention: Merriam-Webster
2. not to mention: Oxford Learner's Dictionaries
3. not to mention: Vocabulary.com
4. not to mention: Cambridge Advanced Learner's Dictionary
5. not to mention: Wiktionary
6. not to mention: Dictionary.com
7. not to mention: Rhymezone
8. not to mention: FreeDictionary.org
9. not to mention: Mnemonic Dictionary
10. not to mention: TheFreeDictionary.com

Miscellaneous (1 matching dictionary)

11. not to mention: Idioms

Definitions from WordNet (not to mention) ▸ adverb:  much less Opposite: including, specifically, particularly, notably, expressly Types: besides, in addition, furthermore, also, moreover, additionally, likewise, too, more... ▸ Words similar to not to mention ▸ Usage examples for not to mention ▸ Idioms related to not to mention ▸ Wikipedia articles (New!) ▸ Words that often appear near not to mention ▸ Rhymes of not to mention ▸ Invented words related to not to mention