Dun \Dun\, a. [AS. dunn. of Celtic origin; cf. W. dwn, Ir. & Gael. donn.]

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 (Zo["o]l.), the hooded crow; -- so called from its color; -- also called hoody, and hoddy.

Dun diver (Zo["o]l.), the goosander or merganser.

Source: Webster's Revised Unabridged Dictionary (1913)
 

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.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Dun \Dun\, n. [See Dune.]

A mound or small hill.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Dun \Dun\, v. t. & i. [imp. & p. p. Dunned; p. pr. & vb. n. Dunning.]

[AS. dyne noise, dynian to make a noise, or fr. Icel. dynr, duna, noise, thunder, duna to thunder; the same word as E. din. ???. See Din.]

To ask or beset, as a debtor, for payment; to urge importunately.

Hath she sent so soon to dun? --Swift.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Dun \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.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Dune \Dune\, n. [The same word as down: cf. D. duin. See Down a bank of sand.]

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.

Source: Webster's Revised Unabridged Dictionary (1913)