What is a hatchback car?
A hatchback is a car with a hatch-style boot-lid, hinged on the roof of the car, so it opens upwards. The space behind the rear seats is also inside the main cabin of the car, as opposed to the separate boot of a saloon car.
Opening the boot-lid opens up the back of the car, creating a large space into which luggage can be loaded. This space can be increased by folding the back seat so you can really load up.