Removing food, dirt, and debris from the surface is called what?

"Removing food, dirt, and debris from the surface" is one of the two definitions of cleaning

Cleaning has two objectives:
* Cleaning the surface from food, grease, debris, and any kind of dirt.
* Eliminating microorganisms, by eliminating them directly using antiseptics, or privatizing them from the grease and the nutrient found in the food and debris. so the two definitions are very close.

Idont really understand