Quick definitions from WordNet (dulness)
▸ noun: without sharpness of edge or point
▸ noun: a lack of visual brightness
▸ noun: the quality of lacking interestingness
▸ noun: the quality of being slow to understand
▸ Also see dulness
▸ Words similar to duller
▸ Usage examples for duller
▸ Popular adjectives describing duller
▸ Words that often appear near duller
▸ Rhymes of duller
▸ Invented words related to duller
▸ noun: without sharpness of edge or point
▸ noun: a lack of visual brightness
▸ noun: the quality of lacking interestingness
▸ noun: the quality of being slow to understand
▸ Also see dulness
▸ Words similar to duller
▸ Usage examples for duller
▸ Popular adjectives describing duller
▸ Words that often appear near duller
▸ Rhymes of duller
▸ Invented words related to duller