ETYM Old Fren. car, char, French cahr, from Latin carrus, Wagon: a Celtic word; cf. W. car, Armor. karr, Irish and Gael. carr. cf. Chariot.
1. A four-wheeled motor vehicle; usually propelled by an internal combustion engine; SYN. auto, automobile, machine, motorcar.
2. A wheeled vehicle adapted to the rails of railroad; SYN. railcar, railway car, railroad car.
3. A compartment suspended from an airship and carrying personnel and cargo and power plant; SYN. gondola.
Popular name for automobile.

civil air regulations