: one engaged in the breeding of a specified organism
c
: a nuclear reactor designed to produce more fissionable material than it uses as fuel
called alsobreeder reactor
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Things began to unravel after Wilson and Matthews' close friend stole several dogs from a breeder with plans to sell them.—Samantha Stutsman, PEOPLE, 10 May 2026 Brent Horvath, breeder and owner of Intrinsic Perennial Gardens in Hebron, Illinois, initially began breeding sedums for green roofs because their shallow roots work exceptionally well there.—Erica Browne Grivas, Midwest Living, 4 May 2026 The facility holds federal licenses as both a dog breeder and a research facility, and is accredited by AAALAC International, an organization that sets standards for the care of research animals.—Jeanine Santucci, USA Today, 30 Apr. 2026 Other Illinois breeders went on to produce the winners of world-class races.—Neil Milbert, Chicago Tribune, 29 Apr. 2026 See All Example Sentences for breeder