I. -ˌbred adjective
Date: 1701
1. : thoroughly trained or skilled
a thoroughbred soldier
2. : bred from the best blood through a long line : purebred
thoroughbred dogs
3.
a. capitalized : of, relating to, or being a Thoroughbred horse
b. : having characteristics resembling those of a Thoroughbred
II. noun
Date: 1820
1. : a purebred or pedigreed animal
2. : a thoroughly educated or skilled person
3. capitalized : 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
[
Thoroughbred
]