What does fastback mean?
A fastback is a type of automobile body characterised by a roofline that slopes downward in one continuous, unbroken curve from the windshield to the tail of the car, rather than stopping abruptly at a separate trunk lid. This flowing profile distinguishes the fastback from the notchback, whose rear deck forms a distinct angular step. The design is prized for two reasons: it suggests speed and sporting elegance, and it offers genuine aerodynamic benefits by smoothing airflow over the rear of the vehicle. The term appears almost entirely within automotive contexts, from sales brochures to enthusiast magazines, and it became especially famous through models like the Ford Mustang Fastback of the mid-1960s. Closely related but not identical body styles include the hatchback and the liftback, which add an upward-opening rear door for cargo access. For anyone reading car reviews or browsing showrooms, fastback is an essential piece of motoring vocabulary.
nounA car body style in which the roofline slopes in a single continuous curve from the top of the windshield all the way to the rear of the vehicle, without a separate, stepped trunk lid.
- A car with a body whose roofline descends in one smooth, uninterrupted curve from the windshield to the rear of the vehicle.
"The new grand tourer's sleek fastback profile gives it a distinctive presence on the motorway."
"He restored a 1968 fastback and showed it at classic car meets every summer."
"Modern electric sedans often adopt a fastback shape because it reduces drag and extends range."
Standard plural, used when referring to multiple vehicles with this body style.
"Fastbacks were especially popular among European manufacturers in the 1970s."
Ford's iconic 1965 Mustang 'Fastback' helped turn a sloping rear window into shorthand for speed — even when the car was standing still.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of fastback
Fastback is an English compound formed from 'fast', describing swift movement or high speed, and 'back', referring to the rear portion of the car. Both elements come from Old English: 'fast' derives from 'fæst', meaning firm or fixed, which later developed the meaning of rapid, while 'back' comes from 'bæc'. The compound emerged in twentieth-century automotive writing, as designers sought a name for the streamlined, sloping-rear bodies that became popular from the 1930s onward. It shares its building blocks with other English compounds such as 'hatchback' and 'backup', which pair 'back' with another element to describe position or direction.
How fastback is actually used
Fastback is used almost exclusively in automotive contexts — advertising, motoring journalism, and enthusiast discussion. It carries connotations of sportiness and aerodynamic efficiency. The term functions descriptively rather than as a brand name, though it is often associated with specific models such as the classic Ford Mustang Fastback.
Easily confused with fastback
A hatchback has a rear door that opens upward for cargo access, while a fastback is defined by its continuously sloping roofline, which may or may not include a hatch.
A notchback has a distinct angular step between the roofline and a separate trunk lid, whereas a fastback's roof flows in one unbroken curve to the tail.