thoroughbred

From thorough +‎ bred.

thoroughbred (comparative more thoroughbred, superlative most thoroughbred)

1. Bred from pure stock.
2. Well-bred and properly educated.

• thoroughbreed

thoroughbred (plural thoroughbreds)

1. Alternative letter-case form of Thoroughbred (“horse bred for racing”).
   • 2023 June 10, Majlie de Puy Kamp, Curt Devine, Audrey Ash, Casey Tolan, Allison Gordon and Pamela Brown, “As horse racing’s best trainers rake in millions, records show they’ve violated rules aimed at keeping the animals safe”, in CNN‎^[1]:

     A CNN analysis of disciplinary records found that the top earning trainers in the sport – whose thoroughbreds win them millions of dollars – have all broken rules meant to keep their horses safe. Trainers slapped with violations have continued racing, pocketing winnings while paying minimal fines. […] During the 2018-2019 season, a staggering 56 horses died at one of the most glamorous racetracks in the country, Santa Anita Park, once home to the famous 1940s thoroughbred Seabiscuit.

2. (loosely) Any purebred horse.
3. A person of uncommon strength or endurance (like that of a thoroughbred horse).

   That athlete is a real thoroughbred.

4. A well-bred person.

• thoroughbred on Wikipedia.Wikipedia
• “thoroughbred”, in OneLook Dictionary Search.
• William Dwight Whitney, Benjamin E[li] Smith, editors (1911), “thoroughbred”, in The Century Dictionary […], New York, N.Y.: The Century Co., →OCLC.