Quick definitions from WordNet (dun)
▸ noun: horse of a dull brownish gray color
▸ noun: a color varying around light grayish brown ("She wore a dun raincoat")
▸ verb: make a dun color
▸ verb: cure by salting ("Dun codfish")
▸ verb: persistently ask for overdue payment ("The grocer dunned his customers every day by telephone")
▸ verb: treat cruelly
▸ adjective: of a dull grayish brown to brownish gray color ("The dun and dreary prairie")
▸ name: A surname (very rare: popularity rank in the U.S.: #43968)
▸ Also see dun
▸ noun: horse of a dull brownish gray color
▸ noun: a color varying around light grayish brown ("She wore a dun raincoat")
▸ verb: make a dun color
▸ verb: cure by salting ("Dun codfish")
▸ verb: persistently ask for overdue payment ("The grocer dunned his customers every day by telephone")
▸ verb: treat cruelly
▸ adjective: of a dull grayish brown to brownish gray color ("The dun and dreary prairie")
▸ name: A surname (very rare: popularity rank in the U.S.: #43968)
▸ Also see dun