say it: FEE-dur
feeder is a noun meaning "an animal being fattened or suitable for fattening". It carries 6 recorded senses.
a machine that automatically provides a supply of some material
“the feeder discharged feed into a trough for the livestock”
an outdoor device that supplies food for wild birds
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for feeder come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.