purebred adjective 1noun 1forms 3 adjective1 •Having genuine parents of the same breed, usually of an animal.Delaney lifted her head, glaring at her only purebred dog—a black Dachshund with bladder control issues—who was tugging at his festively decorated dungaree wraparound diaper, trying to yank it off. — 2009 noun1 •An animal which has genuine parents of the same breed. formspurebreds · more purebred · most purebred