A name used by a racehorse owner under which their horse is registered to compete.

And now he's a racehorse owner like the Vanderbilts.

He made his fortune as an automobile dealer and became a prominent thoroughbred racehorse owner.

He was a keen follower of the turf and a racehorse owner.

To her career as an actress, the always practical Lillie now added another: that of a highly successful racehorse owner.

A racehorse owner agrees to throw a race and has to deal with the consequences of his decision.

Sometimes being a racehorse owner was tough on the nerves.

Now what do I have to do in my new role as racehorse owner?

In later life he became a racehorse owner.

All members of his family are racehorse owners and closely involved in the Equestrian sports.