dun

1 of 4

adjective

1
a
: having a slightly brownish dark gray color : having the color dun (see dun entry 2 sense 2)
b
of a horse : having a grayish-yellow coat with black mane and tail
2
: marked by dullness and drabness
dunness noun

dun

2 of 4

noun (1)

1
: a horse with a grayish-yellow coat and a black mane and tail : a dun horse
2
: a variable color averaging a nearly neutral slightly brownish dark gray
3
: a subadult mayfly
also, fishing : an artificial fly tied to imitate such an insect

dun

3 of 4

verb

dunned; dunning

transitive verb

1
: to make persistent demands upon for payment
dunning their members for contributions
2
: plague, pester
dunned by troubles literary and monetaryIrish Digest

dun

4 of 4

noun (2)

1
: someone who makes persistent demands upon people for payment : a person who duns (see dun entry 3)
2
: an urgent request
especially : a demand for payment

Examples of dun in a Sentence

Noun (2) it's probably not a good idea to ignore a creditor's dun for repayment

Word History

Etymology

Adjective and Noun (1)

Middle English, from Old English dunn — more at dusk

Verb

origin unknown

Noun (2)

noun derivative of dun entry 3

First Known Use

Adjective

before the 12th century, in the meaning defined at sense 1a

Noun (1)

15th century, in the meaning defined at sense 1

Verb

circa 1648, in the meaning defined at sense 1

Noun (2)

1628, in the meaning defined at sense 1

Time Traveler
The first known use of dun was before the 12th century

Cite this Entry

“Dun.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dun. Accessed 5 Sep. 2025.

Kids Definition

dun

1 of 3 noun
1
: a light tan horse with a black mane and tail
2
: a slightly brownish dark gray
dun adjective

dun

2 of 3 verb
dunned; dunning
: to make repeated demands upon for payment
an organization that duns its members for dues

dun

3 of 3 noun
1
: a person who duns another
2
: a demand for payment
Etymology

Noun

Old English dunn (adjective) "having the color of brownish dark gray"

Verb

origin unknown

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