1. One who, or that which, pounds, as a stamp in an ore mill. 2. An instrument used for pounding; a pestle. 3. A person or thing, so called with reference to a certain number of pounds in value, weight, capacity, etc.; as, a cannon carrying a twelve-pound ball is called a twelve pounder. Note: Before the English reform act of 1867, one who was an elector by virtu...