n. One who or that which breeds, procreates, or produces young: used especially of the female.n. One who educates or rears; figuratively, that which rears.n. One who or that which produces, causes, or brings about: as, he was a breeder of dissensions.n. One who procures the birth of young; one who raises a particular breed, as of animals; technically, in herd-and stud-books, the owner of the dam at the time of the birth of the animal recorded.n. Same as bred-sore.