Sometimes now called a fairway metal since they are now made from metal. The fairway wood is typically a rounded club and looks a bit like a smaller version of a driver. They often come numbered 3, 5, 7 and 9.
Any other wooden club other than a driver.
A wood club used to hit the ball from the fairway, rather than the driver.
Any wooden club that's not your driver. Nowadays, you say fairway metal because you don't see many wooden clubs anymore.