What does tailpipe mean?
A tailpipe is the pipe at the back of a motor vehicle through which engine gases escape. The term can also stand for the emissions, fumes, or noise that come from this part of the vehicle: “tailpipe emissions” are a common subject of environmental regulation, while a loud tailpipe may signal a poorly maintained exhaust system. Tailpipe is chiefly a North American word; British speakers more often say “exhaust pipe.” Although it can refer simply to a physical component, the word often appears in public discussion because tailpipe emissions are closely associated with air pollution, fuel efficiency, and vehicle safety. It is therefore both a practical automotive term and a familiar symbol of the environmental impact of driving.
The pipe or exhaust component at the rear of a motor vehicle, through which spent engine gases are released.
"The mechanic inspected the exhaust system and found a leak near the tailpipe."
Chiefly North American; British English usually uses “exhaust pipe.”
The emissions, fumes, noise, or other effects associated with a vehicle's exhaust, especially when discussed in relation to pollution or environmental policy.
"The city introduced a new standard to reduce tailpipe pollution."
This extended sense is especially common in environmental and regulatory contexts.
To follow closely behind another vehicle, especially in traffic or while driving.
"The driver tailpiped the truck for several miles before the traffic slowed."
Informal and chiefly North American.
The plural is used for multiple vehicle exhaust pipes or for separate tailpipe components.
"The inspector tested the tailpipes of several older vehicles."
The tailpipe made vehicle emissions visible: it is where the old language of horsepower meets the modern language of clean air.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does tailpipe come from?
The word is a compound of “tail” and “pipe,” referring literally to a pipe at the tail or rear of a vehicle. The compound is associated with the development of motor vehicles and became established in the late nineteenth and early twentieth centuries. Its sense extended naturally from the physical pipe to the gases and sound escaping through it.
How tailpipe is actually used
“Tailpipe” is common in North American English and in discussions of vehicle emissions. In British English, “exhaust pipe” is generally preferred. When referring to the whole emissions-control system rather than the rear outlet, use “exhaust system.”
Easily confused with tailpipe
A tailpipe is the rear outlet of a vehicle's exhaust system, while an exhaust system includes the engine, catalytic converter, muffler, pipes, and other components that carry and treat engine gases.