We found 24 dictionaries that define the word fatness:

General (18 matching dictionaries)

1. fatness: Merriam-Webster
2. fatness: Oxford Learner's Dictionaries
3. fatness: Collins English Dictionary
4. fatness: Vocabulary.com
5. Fatness, fatness: Wordnik
6. fatness: Cambridge Advanced Learner's Dictionary
7. fatness: Wiktionary
8. fatness: Infoplease Dictionary
9. Fatness, fatness: Dictionary.com
10. Fatness: Wikipedia, the Free Encyclopedia
11. Fatness: Online Plain Text English Dictionary
12. fatness: Webster's Revised Unabridged, 1913 Edition
13. fatness: Rhymezone
14. fatness: AllWords.com Multi-Lingual Dictionary
15. fatness: Webster's 1828 Dictionary
16. fatness: FreeDictionary.org
17. fatness: Mnemonic Dictionary
18. fatness: TheFreeDictionary.com

Computing (1 matching dictionary)

19. Fatness: Encyclopedia

Medicine (3 matching dictionaries)

20. fatness: Merriam-Webster Medical Dictionary
21. online medical dictionary (No longer online)
22. fatness: Medical dictionary

Miscellaneous (1 matching dictionary)

23. fatness: Idioms

Slang (1 matching dictionary)

24. fatness: Urban Dictionary

(Note: See fat as well.)

Definitions from Wiktionary (fatness) ▸ noun:  The state, quality, or condition of being fat. Similar: avoirdupois, fattishness, fattiness, fatuitousness, fatteningness, adiposity, phatness, fatuousness, fatiguingness, corpulence, more... Types: obesity, overweight, corpulence, rotundity, pudginess, stoutness, obeseness, more... Adjectives: excessive, relative, extreme, total, body, own, excess, over, abdominal, leanness, subcutaneous ▸ Words similar to fatness ▸ Usage examples for fatness ▸ Idioms related to fatness ▸ Wikipedia articles (New!) ▸ Popular adjectives describing fatness ▸ Words that often appear near fatness ▸ Rhymes of fatness ▸ Invented words related to fatness