dullness
dull·ness
noun
1.
the quality of being slow to understand
2.
the quality of lacking interestingness
3.
a lack of visual brightness
Origin
From dull + -ness.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.