We found 18 dictionaries that define the word in the buff:

General (14 matching dictionaries)

1. in the buff: Merriam-Webster
2. in the buff: Oxford Learner's Dictionaries
3. in the buff: Vocabulary.com
4. in the buff: Cambridge Advanced Learner's Dictionary
5. in the buff: Wiktionary
6. in the buff: Dictionary.com
7. in the buff: Rhymezone
8. in the buff: FreeDictionary.org
9. in the buff: Mnemonic Dictionary
10. in the buff: TheFreeDictionary.com
11. In the buff: Phrase Finder
12. in the buff: Longman Dictionary of Contemporary English

Computing (1 matching dictionary)

13. in the buff: Encyclopedia

Miscellaneous (1 matching dictionary)

14. in the buff: Idioms

Slang (2 matching dictionaries)

15. in the buff: English slang and colloquialisms used in the United Kingdom
16. in the buff: Urban Dictionary

Definitions from WordNet (in the buff) ▸ adjective:  (used informally) completely unclothed Opposite: clothed, dressed, covered ▸ Words similar to in the buff ▸ Usage examples for in the buff ▸ Idioms related to in the buff ▸ Wikipedia articles (New!) ▸ Popular nouns described by in the buff ▸ Words that often appear near in the buff ▸ Rhymes of in the buff ▸ Invented words related to in the buff