What is a sports car?

This from Wikipedia...Sports cars are not usually intended to regularly transport more than two adult occupants, so most modern sports cars are usualy a two-seat layout or 2+2 layout (two smaller rear seats for children or occasional adult use).  Larger cars with a more spacious rear-seat (such as Camaros, Mustangs and Challengers) accommodation are usually considered sports sedans (or coupes) rather than a true sports car.