My answer: To best explain the difference between barbequing and grilling, I’d like to quote Tori Avery from her blog, INSPIRED BY OUR DELICIOUS PAST.
Before we dig into some smoky, charbroiled, lip-smacking history, let’s clear up a common misconception: grilling and barbecuing are not the same thing. While the terms are often used interchangeably (particularly in the northern United States), the truth is that grilling and barbecuing are two very different cooking methods. Grilling is the most basic form of cooking—it is, quite simply, the method of cooking a food directly over an open flame or high heat source. Barbecue, on the other hand, is a low and slow method of cooking over indirect heat.
THE HISTORY OF BARBEQUE AND GRILLING from Tori’s blog is an entertaining and informative way to learn the history of cooking methods, foods or recipes. People have been grilling and barbequing since caveman days (some believe even longer), which makes both cooking methods vintage.