"Dun" has multiple meanings depending on the context in which it is used. It can refer to a color, a horse with a specific coat color, or a verb meaning to make repeated and insistent demands upon, especially for the payment of a debt. The color "dun" is described as a slightly brownish dark gray, and it can also refer to a horse with a grayish-yellow coat and a black mane and tail. Additionally, "dun" can be used as a verb to describe the act of making persistent demands upon someone for payment. It can also be used as a noun to refer to a person who makes such demands. Furthermore, the term "D-U-N-S Number" is a unique nine-digit identifier for businesses that is associated with a businesss Live Business Identity and is used by many businesses to access a company’s credit profile to help evaluate it as a partner. Therefore, "dun" can refer to a color, a horse coat color, a verb, a noun, and a unique identifier for businesses.