1
- of a dull greyish-brown colour暗褐色的, 灰褐色的：
a dun cow.
灰褐色的母牛。
1.1
- poetic/literary dark; dusky〈诗/文〉阴暗的, 灰暗的：
when the dun evening comes.
阴暗的夜晚来临时。
1
- mass noun a dull greyish-brown colour暗褐色, 灰褐色。
2
- a thing that is dun in colour, in particular a horse with a sandy or sandy-grey coat, black mane, tail, and lower legs, and a dark dorsal stripe灰褐色的东西; （尤指背部有深色条纹的）灰毛黑鬃矮马。
2.1
- a sub-adult mayfly, which has drab coloration and opaque wings蜉蝣的亚成虫。
2.2
- an artificial fishing fly imitating this仿蜉蝣亚成虫的假鱼饵。
词源
Old English dun, dunn, of Germanic origin; probably related to DUSK.
dunned, dunning
with obj.（一般作 be dunned）make persistent demands on (someone), especially for payment of a debt（一再）向…索取, （一再）向…讨债：after he left Oxford he was frequently dunned for his debts.
在他离开牛津后还经常有人向他讨债。
词源
early 17th cent. (as a noun)： from obsolete Dunkirk privateer, from the French port of DUNKIRK.
- Archaeology a stone-built fortified settlement in Scotland or Ireland, of a kind built from the late Iron Age to the early Middle Ages. The word is a frequent place-name element in Scotland and Ireland.【考古】（用石头修建的）设防高地（苏格兰与爱尔兰铁器时代晚期到中世纪早期的一种设防的居住区, dun一词常用于构成苏格兰和爱尔兰的地名）。
词源
late 18th cent.: from Irish dún, Scottish Gaelic dùn 'hill or hill fort'.