Simplify the following text for a Grade 6 native English-speaking person.
Original: The definition can be varied and complicated by other issues ; certain groups do not consider ( or have traditionally not considered ) food waste to be a waste material , due to its applications ; some definitions of what food waste consists of are based on other waste definitions ( e.g. agricultural waste ) , and which materials do not meet their definitions .
Simplified: There are many definitions of waste , and so there are also different definitions of food waste .