The term “BBQ” is largely misused by the general public. It has been implied to mean anything cooked on a grill. It may mean a party or a get together with friends and family. But, Barbecue is not a dish, or a cooking device, nor an event. It is a METHOD of cooking.
There is definite difference between grilling and barbecuing. If you “grill” the meat it means you are cooking it over direct heat of a fire, searing the outside and concentrating on not overcooking the inside. It is a healthful method of cooking as oils or fats are seldom used.
“Barbeque”, or “Bar-be-que”, or just plain ‘ol “BBQ” on the other hand is the process or method of “smoking” meat at low temperatures for long periods of time. You take a large cut of tough meat and “smoke” it.