D defs.my
Entry 1 sense Webster, 1913

Thoroughbred

/thẽr'-ōb-rĕd'/ · Thor·ough·bred · IPA /θˈɜroʊbrˈɛd/
01 a. Bred from the best blood through a long line; pure-blooded; -- said of stock, as horses. Hence, having the characteristics of such breeding…
  1. 1.
    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.