THOROUGHBRED

I. adjective Date: 1701 thoroughly trained or skilled , bred from the best blood through a long line ; purebred , 3. of, relating to, or being a Thoroughbred horse, having characteristics resembling those of a Thoroughbred, II. noun Date: 1820 a purebred or pedigreed animal, a thoroughly educated or skilled person, any of an English breed of light speedy horses kept chiefly for racing that originated from crosses between English mares of uncertain ancestry and Arabian stallions