What is the meaning of feeder?

noun

• An animal being fattened or suitable for fattening.
• Someone who consumes food for nourishment.
  • synonyms: eater
• A branch that flows into the main stream.
  • synonyms: tributary, confluent, affluent
• A machine that automatically provides a supply of some material.
  • usage: "the feeder discharged feed into a trough for the livestock"
  • synonyms: self-feeder
• An outdoor device that supplies food for wild birds.
  • synonyms: bird feeder, birdfeeder
• An animal that feeds on a particular source of food.
  • usage: "a bark feeder"; "a mud feeder"