We found 15 dictionaries that define the word dementedness:

General (11 matching dictionaries)

1. dementedness: Merriam-Webster
2. dementedness: Oxford Learner's Dictionaries
3. dementedness: Collins English Dictionary
4. dementedness: Vocabulary.com
5. dementedness: Wordnik
6. dementedness: Wiktionary
7. dementedness: Dictionary.com
8. dementedness: Rhymezone
9. dementedness: FreeDictionary.org
10. dementedness: Mnemonic Dictionary
11. dementedness: TheFreeDictionary.com

Business (1 matching dictionary)

12. dementedness: Legal dictionary

Computing (1 matching dictionary)

13. dementedness: Encyclopedia

Medicine (2 matching dictionaries)

14. dementedness: Merriam-Webster Medical Dictionary
15. dementedness: Medical dictionary

(Note: See demented as well.)

Definitions from Wiktionary (dementedness) ▸ noun:  The quality of being demented. Similar: dementia, derangedness, distemperedness, discomposedness, degenerateness, demeaningness, dazedness, degradedness, derangement, dottiness, more... Opposite: sanity, lucidity, clarity ▸ Words similar to dementedness ▸ Usage examples for dementedness ▸ Idioms related to dementedness ▸ Wikipedia articles (New!) ▸ Popular adjectives describing dementedness ▸ Words that often appear near dementedness ▸ Rhymes of dementedness ▸ Invented words related to dementedness