tailpipe

The tailpipe is the metal tube at the back of a car or other vehicle where exhaust gases come out after the engine runs. People often connect it with air pollution because those gases can contain harmful substances. If you see smoke coming from it, that usually tells you the engine is on or that something may be wrong.

You will often see this word in everyday talk about cars, repairs, emissions tests, and the environment. It is a practical word, not a poetic one, and it usually refers to the actual part of a vehicle.

The tailpipe is the part of a vehicle's exhaust system that releases waste gases into the air. It is usually a metal pipe found at the rear of a car, truck, or motorcycle. After fuel burns in the engine, the gases move through the exhaust system and finally leave through this pipe.

This word is most common in discussions about driving, vehicle parts, repairs, emissions, and pollution. People may talk about a damaged tailpipe, smoke coming from it, or rules meant to reduce what comes out of it. In older car designs, the pipe was often easy to see, while in some newer vehicles it may be less visible or built into the design.

The meaning is mainly literal. It usually refers to the real exhaust outlet of a vehicle, not to a figurative source of unwanted output. The word is also useful when comparing gas-powered vehicles with electric vehicles, since electric vehicles do not have one.

So in everyday English, the tailpipe is the back part of the exhaust system where engine gases come out, and the word often appears when people talk about cars, air quality, and emissions.