definition of
dun

[1] #1 dun n. horse of a dull brownish grey color. wn

[2] #2 dun s. of a dull greyish brown to brownish grey color; "the dun and dreary prairie". wn

[3] #3 dun v. [torment, rag, bedevil, crucify, frustrate] treat cruelly; "The children tormented the stuttering teacher". wn

[4] #4 dun n. [greyish brown, grayish brown, fawn] a color or pigment varying around a light grey-brown color; "she wore dun". wn

[5] #5 dun v. persistently ask for overdue payment; "The grocer dunned his customers every day by telephone". wn