dull - definition of dull by The Free Dictionary
dull (dŭl) adj. dull·er, dull·est 1. a. Arousing little interest; lacking liveliness; boring: a dull movie. b. Not brisk or rapid; sluggish: Business has been dull. 2. Not having a sharp edge or point; blunt: a dull knife. 3. a. Not intensely or keenly fe...