Dun

Dun most commonly refers to:

Dun gene, which produces a brownish-gray color (dun) in horses and other Equidae
Dun (fortification), an ancient or medieval fort

Dun or DUN may also refer to:

Places

Dun, Angus, a civil parish in Scotland
Dun Bhruichlinn, an Iron Age fort south of Esknish, Islay, Scotland
Dun Borrafiach, an Iron Age broch on the island of Skye, Scotland
Dun Guaidhre, an Iron Age fort southwest of Kilmeny, Islay, Scotland
Dun Nosebridge, an Iron Age fort southeast of Bridgend, Islay, Scotland
Dun Ringill, an Iron Age hill fort on the Strathaird peninsula on the island of Skye, Scotland
Dùn, an island of St Kilda, Scotland
House of Dun, a Scottish estate

Dun, Iran, a village in Hormozgan Province, Iran
Dun Sar, a village in Gatab-e Shomali Rural District, Gatab District, Babol County, Mazandaran Province, Iran

Subimago, or dun, a stage in the life cycle of mayflies, especially an artificial fishing fly tied to imitate one

Dial-up networking (DUN) a dialed connection to the Internet via public telephone lines
- Dial-up Networking Profile, a Bluetooth computer communications profile

Data Universal Numbering System (DUNS), a unique numeric identifier for businesses
Dewan Undangan Negeri (DUN), the legislatures of Malaysian states
Dün (band), a French progressive rock band active 1978-1981
Dun & Bradstreet, an American credit reporting agency
Dun comma or enumeration comma, a Chinese punctuation mark
Dun Cow, a brown bovine; a common motif in English folklore
Prince Dun, a peerage in Manchu China