The definition of an automobile is a means of transportation that usually has wheels and an engine.
it is also called the spare parts of cars
A passenger vehicle, usually four-wheeled, propelled by an engine or motor that is part of it, esp. an internal-combustion engine, and meant for traveling on streets or roads; motorcar.
A automobile is a transportation method that drives on four wheels. Automobiles like cars are used to get around places, say the supermarket. Automobiles use gas to move. If a automobile didn't have gas, it would not get you anywhere. The origin of automobiles comes from the terms "auto" (meaning self) and mobiles, which means moving. So if you put it together, you get self-moving four wheeled transportation method.