Many people misuse the term barbecue.
It has come to be applied to anything cooked on a grill, or even in the oven if a spicy tomato based sauce is applied. Barbecue is not a dish, or a cooking device, it is a method of cooking. There is a distinct difference between grilling and barbecueing, however. Grilling is done over the direct heat of a fire. The object is to sear the outside and concentrate the juices on the inside.