adjective
Definition: Describing a color that is a grayish-yellow, often associated with certain animals, especially horses, or indicating something that is dull and lacking brightness.
Example: The horse had a beautiful dun coat that shimmered in the sunlight.
noun
Definition: A term used to describe a dull grayish-brown color, often associated with certain horses or fishing flies.
Example: The horse was a beautiful dun, with a coat that shimmered in the sunlight.
transitive verb
Definition: To repeatedly ask someone to pay a debt or fulfill an obligation.
Example: The company sent a dun to the client after the payment was overdue.