What does Audi mean?

Audi is named for the Latin word for 'hark' as in auditory. The reason was that the automobile inventor's last name was German for hark, "Horch" but he lost the right to make cars with that name when he was bought out by his partners. His son came up with the name. The four circle logo represents the four companies (Wanderer, Audi, Horch (yeah! they were bought out!) and DKW) that joined together to make today's Audi Union, a division of VW.