#1 dun n. horse of a dull brownish grey color. wn
#2 dun s. of a dull greyish brown to brownish grey color; "the dun and dreary prairie". wn
#3 dun v. [torment, rag, bedevil, crucify, frustrate] treat cruelly; "The children tormented the stuttering teacher". wn
#4 dun n. [greyish brown, grayish brown, fawn] a color or pigment varying around a light grey-brown color; "she wore dun". wn
#5 dun v. persistently ask for overdue payment; "The grocer dunned his customers every day by telephone". wn
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