We found 16 dictionaries that define the word root and branch:

General (12 matching dictionaries)

1. root and branch: Longman Dictionary of Contemporary English
2. root and branch: Merriam-Webster
3. root and branch: Oxford Learner's Dictionaries
4. root-and-branch, root-and-branch, root and branch: Collins English Dictionary
5. root and branch: Wordnik
6. root and branch: Cambridge Advanced Learner's Dictionary
7. root and branch: Wiktionary
8. Root and branch, root and branch: Dictionary.com
9. root and branch: FreeDictionary.org
10. Root and branch, root-and-branch: TheFreeDictionary.com

Business (1 matching dictionary)

11. root-and-branch: Legal dictionary

Computing (1 matching dictionary)

12. root-and-branch: Encyclopedia

Medicine (1 matching dictionary)

13. root-and-branch: Medical dictionary

Miscellaneous (1 matching dictionary)

14. root-and-branch, root and branch: Idioms

Definitions from Wiktionary (root and branch) ▸ adjective:  Total, thorough, sweeping, complete, radical, drastic. ▸ adverb:  Totally, completely. Similar: root-and-branch, radical, full-bore, thorough, in-depth, out-and-out, thoroughpaced, flat out, super-duper, full out, more... Opposite: completely, entirely, wholly, fully, totally Phrases: root and branch men, more... ▸ Words similar to root and branch ▸ Usage examples for root and branch ▸ Idioms related to root and branch ▸ Wikipedia articles (New!) ▸ Popular nouns described by root and branch ▸ Words that often appear near root and branch ▸ Rhymes of root and branch ▸ Invented words related to root and branch