A hired drudge; a hireling; a prostitute.
Let out for hire; devoted to common use; hence, much used; trite; mean; as, hackney coaches; hackney authors.
To devote to common or frequent use, as a horse or carriage; to wear out in common service; to make trite or commonplace; as, a hackneyed metaphor or quotation.
To carry in a hackney coach.
A type of horse of no great value. (Prestwich, Michael. Armies and Warfare in the Middle Ages: The English Experience, 347)
Breed of horse exhibiting a disctinctive high-stepping action. Popular as a light harness horse.
a compact breed of harness horse
A Hackney is usually a Private Hire Vehicle usually operating out of an office. These vehicles are expected to do high mileage.
action: The high lifting of the front feet, like that of a hackney horse.
The Hackney Horse is a recognized breed that was developed in Great Britain. A studbook has been maintained for this breed since 1833 by the Hackney Horse Society, which has its headquarters in Norwich. The breed takes its name from the Hackney area of London, England (the uncapitalized term, "hackney" is a more general designation for horses used for ordinary driving or riding).