1. a person or thing that dunns; one who makes persistent demands for payment of a debt
Usage: often used in business or debt collection contexts
2. a dull grayish-brown color
Usage: chiefly British; also used as an adjective

Examples

• The dunner called repeatedly to collect the overdue bill.
• She worked as a dunner for a credit company.
• The horse had a dunner coat that blended into the landscape.
• His dunner suit was practical and professional.
• The dunner kept sending letters demanding payment.
• The fabric came in a soft dunner shade.