
Open English Wordnet
Nouns
(n)dunhorse of a dull brownish grey color Verbs
(v)dunpersistently ask for overdue payment“The grocer dunned his customers every day by telephone” (v)duncure by salting“dun codfish” Adjectives
(s)dunof a dull greyish brown to brownish grey color“the dun and dreary prairie”