dun1Pronunciation: /dʌn/Definition of dun adjective of a dull greyish-brown colour:a dun cow literary dark or dusky:when the dun evening comes noun 1 [mass noun] a dull greyish-brown colour. 2a horse with a sandy or sandy-grey coat, black mane, tail, and lower legs, and a dark dorsal stripe. 3a subadult mayfly, which has drab coloration and opaque wings. an artificial fishing fly made to resemble a dun. Origin: Old English dun, dunn, of Germanic origin; probably related to duskdun in other Oxford dictionaries Definition of dun in the US English dictionary
