noun a mound or small hill.
2. dun ·noun one who duns; a dunner.
3. dun ·noun an urgent request or demand of payment; as, he sent his debtor a dun.
4. dun ·vt & ·vi to ask or beset, as a debtor, for payment; to urge importunately.
5. dun ·adj of a dark color; of a color partaking of a brown and black; of a dull brown color; swarthy.
6. dun ·vt 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.