a well-bred person
"Despite his flashy clothes, he is a thoroughbred who always treats every stranger with genuine kindness and respect."
a racehorse belonging to a breed that originated from a cross between Arabian stallions and English mares
"The jockey guided the thoroughbred around the final turn, its lineage tracing back to the original Arabian stallion and English mare crosses."
a pedigreed animal of unmixed lineage; used especially of horses
"The trainer proudly showed off his new thoroughbred, whose pure bloodline guaranteed it would win every race in the season."
Alternative letter-case form of Thoroughbred (“horse bred for racing”)
"The jockey guided the thoroughbred around the final turn, knowing that only a horse with such pure racing lineage could hope to win today's Derby."
A horse of a breed derived from crosses between Arabian stallions and English mares, bred for racing, with its breeding history recorded in an official stud book.
having a list of ancestors as proof of being a purebred animal
"The judge inspected the stallion's pedigree closely to verify that it was indeed a thoroughbred before allowing him into the race."
Bred from pure stock.
"The racehorse was a true thoroughbred, bred exclusively from a lineage of champion runners to ensure it had the speed for the derby."