A coachbuilder is a manufacturer of bodies for automobiles and a manufacturer of complete horse-drawn vehicles.

Coachwork is the body of a motor vehicle (automobile, van, bus or truck), a horse-drawn coach or carriage (whence the term originated, derived from the Hungarian town of Kocs), or, by extension, a railroad car or railway carriage. The term is usually reserved for bodies built on a separate chassis, rather than being of unitary or monocoque construction. With reference to motor vehicles, auto body is the standard term in North American English. An obsolescent synonym is carrossery (plural: carosseries).