Waste First, let us consider what is meant by waste and waste management. Arguably, every product ends up as waste. Waste generally refers to discarded, unwanted material with zero value in its original market; but from a different perspective, waste is the refuse or residual matter that is unwanted, or the undesired material left over after the completion of a process. This definition must be qualified by the consideration that uselessness and lack of value are relative in many respects-dependent, in general, on differences of culture, socioeconomic status, and gender. Some items that are waste to the rich can be usable and valuable to the poor, or some items regarded as junk by women may be found useful by men and vice versa.