dulness

Noun	1.	dulness - the quality of being slow to understand Synonyms: dullness, obtuseness
	2.	dulness - the quality of lacking interestingness Synonyms: dullness
	3.	dulness - a lack of visual brightness Synonyms: dullness
	4.	dulness - without sharpness of edge or point Synonyms: bluntness, dullness

dullness, obtuseness, oscitance, oscitancy, stupidity