Definify.com
Webster 1913 Edition
Thoroughbred
Thor′ough-bredˊ
,Adj.
Bred from the best blood through a long line; pure-blooded; – said of stock, as horses. Hence, having the characteristics of such breeding; mettlesome; courageous; of elegant form, or the like.
– Noun.
A thoroughbred animal, especially a horse.