dun /ˈdʌn/
  催促者,討債者,催羅(vi.)(vt.)催討(a.)暗褐色的,微暗的
  Dun, n.
  1. One who duns; a dunner.
     To be pulled by the sleeve by some rascally dun.   --Arbuthnot.
  2. An urgent request or demand of payment; as, he sent his debtor a dun.
  Dun, v. t. To cure, as codfish, in a particular manner, by laying them, after salting, in a pile in a dark place, covered with salt grass or some like substance.
  Dun v. t. & i. [imp. & p. p. Dunned p. pr. & vb. n. Dunning ]  To ask or beset (e.g., a debtor), for payment; to urge importunately.
     Hath she sent so soon to dun?   --Swift.
  Dun, a.  Of a dark color; of a color partaking of a brown and black; of a dull brown color; swarthy.
     Summer's dun cloud comes thundering up.   -- Pierpont.
  Chill and dun
  Falls on the moor the brief November day.   --Keble.
  Dun crow Zool., the hooded crow; -- so called from its color; -- also called hoody, and hoddy.
  Dun diver Zool., the goosander or merganser.
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  Dune n.  A low hill of drifting sand usually formed on the coats, but often carried far inland by the prevailing winds. [Written also dun.]
     Three great rivers, the Rhine, the Meuse, and the Scheldt, had deposited their slime for ages among the dunes or sand banks heaved up by the ocean around their mouths.   --Motley.
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  dun
       adj : of a dull grayish brown to brownish gray color; "the dun and
             dreary prairie"
       n 1: horse of a dull brownish gray color
       2: a color varying around light grayish brown; "she wore a dun
          raincoat" [syn: grayish brown, greyish brown, fawn]
       v 1: treat cruelly; "The children tormented the stuttering
            teacher" [syn: torment, rag, bedevil, crucify, frustrate]
       2: persistently ask for overdue payment; "The grocer dunned his
          customers every day by telephone"
       3: cure by salting; "dun codfish"
       4: make a dun color
       [also: dunning, dunned, dunnest, dunner]