Of a dull or dingy brown colour; spec. of a dull greyish-brown colour, typical of the coats of donkeys, mice, and numerous other animals.

Darkened or dull in colour; esp. of a dull, greyish, or dingy brown colour. Cf. dun, adj. 1 2.

Somewhat dun in colour; tending towards a dull greyish-brown.

Dull greyish-brown in colour. Also more generally: dark, dusky.

Of a dull light-brown or yellowish-brown.