Hi Coffee Music,
If you do a Google search for the roasting levels for coffee beans, you will see many descriptions of each kind of roast.
French Roast is one of those levels. Here is an example:
Roasting just slightly longer brings coffee to the French Roast level. With more oil on the bean and a little darker color than Full City Roast, French Roast brings coffee to the height of it's flavor. French Roast creates a deep heavy flavor, some of the more subtle flavors of coffee will be hidden by the dark roasted smokeyness.
~ Rose