"dullness" in the noun sense
1. dullness, obtuseness
the quality of being slow to understand
2. dullness
the quality of lacking interestingness
"the stories were of a dullness to bring a buffalo to its knees"
3. dullness
a lack of visual brightness
"the brightness of the orange sky was reflected in the dullness of the orange sea"
4. dullness
lack of sensibility
"there was a dullness in his heart"
"without him the dullness of her life crept into her work no matter how she tried to compartmentalize it."
5. dullness, bluntness
without sharpness or clearness of edge or point
"the dullness of the pencil made his writing illegible"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License