1. characteristically having a pointed snout, small, rounded ears, and a long, naked or almost hairless tail. 2. Any of various similar or related animals, such as the jumping mouse, the vole, or the jerboa. 3. A cowardly or timid person. 4. A discolored swelling under the eye caused by a blow; a black eye. 5. A hand-held, button-activated input device that when rolled along a flat surface directs an indicator to move correspondingly about a computer screen, allowing the operator to move the indicator freely, as to select operations or manipulate text or graphics. 6. To hunt mice. 7. To search furtively for something; prowl.
