We found 17 dictionaries that define the word and then some:

General (15 matching dictionaries)

1. and then some: Merriam-Webster
2. and then some: Oxford Learner's Dictionaries
3. and then some: Vocabulary.com
4. and then some: Cambridge Advanced Learner's Dictionary
5. and then some: Wiktionary
6. and then some: Dictionary.com
7. and then some: Rhymezone
8. and then some: MyWord.info
9. and then some: FreeDictionary.org
10. and then some: ESL Idiom Page
11. and then some: Mnemonic Dictionary
12. and then some: TheFreeDictionary.com
13. and then some: Longman Dictionary of Contemporary English

Miscellaneous (1 matching dictionary)

14. and then some: Idioms

Slang (1 matching dictionary)

15. and then some: Urban Dictionary

Definitions from WordNet (and then some) ▸ adverb:  and considerably more in addition ("It cost me a week's salary and then some") Phrases: eager and then some, dig deep and then some, indulged and then some, like and then some, of note and then some, more... ▸ Words similar to and then some ▸ Usage examples for and then some ▸ Idioms related to and then some ▸ Wikipedia articles (New!) ▸ Words that often appear near and then some ▸ Rhymes of and then some ▸ Invented words related to and then some