What does the word thoroughbred mean?

Usage examples for thoroughbred

  1. Miriam is a most lovely girl, but her character has not hardened itself into what it is going to be, and association with a thoroughbred girl, such as Dora Bannister, admirably educated, who has seen something of the world, with an intelligence and wit such as I have never known in any one of her age, and more than all with a soul as beautiful as her face, cannot fail to be an inestimable benefit to your sister. – The Girl at Cobhurst by Frank Richard Stockton
  2. I did not obey the order, but touched lightly the flank of my thoroughbred with my spur and he left the house behind like the wind. – Campaign of Battery D, First Rhode Island light artillery. by Ezra Knight Parker