what is a debunk for when someone uses the definition of world being "the material of all that exist"

One possible debunk of this definition is that it is overly simplistic and narrow. The concept of the world is much more complex and multifaceted than simply being the material of all that exists. In addition to physical matter, the world also includes intangible elements such as ideas, cultures, relationships, and emotions. By reducing the definition to just material existence, important aspects of the world are ignored or overlooked.

is there another debunk?

Another possible debunk is that the definition of the world as "the material of all that exists" is limited and excludes non-material or metaphysical aspects of reality. Many people believe in the existence of spiritual, supernatural, or transcendental realms that cannot be explained or confined to the material world. By dismissing these non-material aspects of existence, the definition fails to capture the full complexity and diversity of human experience and understanding of the world.