Definitions of car:

• noun:   4-wheeled motor vehicle; usually propelled by an internal combustion engine

  Example: "He needs a car to get to work"

• noun:   a wheeled vehicle adapted to the rails of railroad

  Example: "Three cars had jumped the rails"

• noun:   where passengers ride up and down

  Example: "The car was on the top floor"

• noun:   car suspended from an airship and carrying personnel and cargo and power plant
• noun:   a conveyance for passengers or freight on a cable railway

  Example: "They took a cable car to the top of the mountain"

• name:  A surname (very rare: popularity rank in the U.S.: #32284)