a container with food for animals or birds:
a bird feeder
something that provides supplies for something else:
The Shyok River is a major feeder of the Indus River.
The length of the feeder pipe is 50m.
a piece of equipment that supplies something to a machine:
the printer's paper feeder
a person or animal that eats in a particular way:
Catfish are bottom feeders. (=they feed at the bottom of rivers)
a small road, railway line, or airline service that takes traffic to a main road, line, or service