- A vehicle that runs on rails, esp. a railroad car
- a wheeled vehicle adapted to the rails of railroad; "three cars had jumped the rails"
- A road vehicle, typically with four wheels, powered by an internal combustion engine and able to carry a small number of people
- the compartment that is suspended from an airship and that carries personnel and the cargo and the power plant
- A railroad car of a specified kind
- a motor vehicle with four wheels; usually propelled by an internal combustion engine; "he needs a car to get to work"