馬うま主ぬし

noun

horse owner; owner of a horse

General term for the owner of a horse, especially in the context of horse racing.

• 彼かれは競きょう走そう馬ばの馬うま主ぬしです。

  He is the owner of a racehorse.

noun

registered owner (of a racehorse)

Only with reading うまぬし

Specifically refers to the officially registered owner of a racehorse, as recognized by racing authorities. This sense is restricted to the reading うまぬし.