noun

• One who feeds, or gives food to another.
• The participant in feederism who feeds the other (the feedee).
• One who feeds, or takes in food.
• One who, or that which, feeds material into something (especially a machine).
• 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.
• (shipbuilding, navigation) A feeder ship.
• (US, law) A judge whose law clerks are often selected to become clerks for the Supreme Court.
• (baseball, slang, archaic, 1800s) The pitcher.
• (video games, derogatory) 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.
• (obsolete) One who abets another.
• (obsolete) A parasite.
• (education) Short for feeder school. [A school or college, many of whose graduates continue their education at another specific school or college, or enter a specific profession]