We found 16 dictionaries that define the word dulness:

General (11 matching dictionaries)

1. dulness: Merriam-Webster
2. dulness: Collins English Dictionary
3. dulness: Wordnik
4. dulness: Wiktionary
5. dulness: Dictionary.com
6. Dulness: Wikipedia, the Free Encyclopedia
7. dulness: Rhymezone
8. Dulness: Dictionary of Phrase and Fable (1898)
9. dulness: FreeDictionary.org
10. dulness: TheFreeDictionary.com
11. Dulness: Wordnik

Business (1 matching dictionary)

12. dulness: Legal dictionary

Computing (1 matching dictionary)

13. dulness: Encyclopedia

Medicine (2 matching dictionaries)

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

Miscellaneous (1 matching dictionary)

16. dulness: Idioms

(Note: See dull as well.)

Definitions from Wiktionary (Dulness) ▸ noun:  Archaic spelling of dullness. [The quality of being slow of understanding things; stupidity.] Similar: obtuseness, bluntness, insensibility, insipidity, torpidity, indolence, inconsequence, indifferency, irksomeness, loquacity, more... Adjectives: cardiac, hepatic, mental, slight, absolute, splenic, superficial, relative, deep, general, marked ▸ Words similar to dulness ▸ Usage examples for dulness ▸ Idioms related to dulness ▸ Wikipedia articles (New!) ▸ Popular adjectives describing dulness ▸ Words that often appear near dulness ▸ Rhymes of dulness ▸ Invented words related to dulness