Feeder meaning : One who feeds, or gives food to another. One who feeds, or takes in food. One who, or that which, feeds material into something. That which is used to feed. A tributary stream, especially of a canal. A branch line of a railway. A transmission line that feeds the electricity for an electricity substation, or for a transmitter. A feeder school. A feeder ship. A judge whose law clerks are often selected to become clerks for the Supreme Court. (1800s) The pitcher. A player whose character is killed by the opposing player or team more than once, deliberately or through lack of skills and experience, thus helping the opposing side. One who abets another. A parasite.