A tummy tuck (abdominoplasty) usually addresses the abdomen with attention directed to tightening a lax muscular abdominal wall and removing excess fat and skin to the extent that each exists.  A belt lift, or belt lipectomy, is more of a circumferential procedure - like a belt, it goes all the way around the trunk.  It involves the removal of excess skin and fat and is often employed in individuals who have undergone massive weight loss and have significant hanging excess skin.  With that said, most plastic surgeons performing tummy tucks understand that our patients are 3-dimensional - that the abdomen is connected to the hips and the hips connected to the flanks - and that aesthetically appropriate body contouring is usually a circumferential procedure.  When a tummy tuck is performed, liposuction is usually added to extend the procedure all the way around the trunk; if circumferential skin excision is necessary to deliver the best result, then it should be performed.  So, a belt lift does not necessarily include a tummy tuck, but the two procedures are intimately related.