car (kär) n.
1. An automobile.
2. A vehicle, such as a streetcar, that runs on rails: a railroad car.
3. A boxlike enclosure for passengers and freight on a conveyance: an elevator car.
4. The part of a balloon or airship that carries people and cargo.
5. Archaic. A chariot, carriage, or cart.

con·cept (knspt) n.
1. A general idea derived or inferred from specific instances or occurrences.
2. Something formed in the mind; a thought or notion. See Synonyms at idea.
3. A scheme; a plan: “began searching for an agency to handle a new restaurant concept” (ADWEEK).