Definitions of shiner:

• noun:   any of numerous small silvery North American cyprinid fishes especially of the genus Notropis
• noun:   something that shines (with emitted or reflected light)
• noun:   a bruise caused by a blow to the eye
• noun:   important food fish of the northern Atlantic and Mediterranean; its body is greenish-blue with dark bars and small if any scales
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #16728)