Car can be taken to mean:

Vehicle

• An automobile. the default usage
• The portion of a transportation system (e.g. an elevator) in which passengers are carried.
• A single member of a group of linked transport 'containers' pulled together by an engine and set on rails, called a railroad car or boxcar. See rail transport

Programming Term

• A function used by programming languages that are dialects of Lisp. It is used to refer to the head of a list. See car (function) and cdr.

Proper Name

• Cars is a commune in the Gironde département, in France.
• The Cars is the name of a late 1970s American New Wave band.
• Car was the name of the mythical eponymous ancestor of the Carians (Herod.. 1.171).