adjective

Etymology: ME & OE, akin to OS, chestnut-brown, ult. (? via Celt) < IE *dhus-no < base *dhus, dust-colored: see fury

noun

1. a dull grayish brown
2. a dun horse
3. an artificial fishing fly of this color
4. mayfly

transitive verb, intransitive verb dunned, dunning dun′·ning

1. to ask (a debtor) insistently or repeatedly for payment
2. to annoy constantly

Etymology: ? dial. var. of din

noun

1. a person who duns
2. an insistent demand, esp. for payment of a debt