Definitions for BBQing and grilling are about as numerous as recipes for BBQ sauces.
As a general rule, you are right, but still, normally you use sauces when BBQing and don't when you are grilling.
It should be noted that you can both grill and BBQ indoors, but I personally don't recommend it.
I'm sure you are aware of the appliance called the George Forman grill, and I have been seeing others advertised on TV lately, but I don't see how they could possibly compare with grilling on charcoal.
Phil
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