/ Dictionary / Index B breeder: Meaning and Definition of Find definitions for: breed•er Pronunciation: (brē'dur), [key] — n. an animal, plant, or person that produces offspring or reproduces. a person who raises animals or plants primarily for breeding purposes. Also calleda nuclear reactor in which more fissile material is produced than is consumed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: breeder (Thesaurus) breed breeding Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language