Gross method definition including break down of areas in the definition. Analyzing the definition of key term often provides more insight about concepts. Gross method can be defined as: Method of recording purchases at the full invoice price without deduction any cash discounts. Gross method has to do with weather report a purchase at the full price or net of a cash discount. Gross method would report a purchase of full price and then account for the discount if payment was made within the discount time period, gross method implicitly assuming we will not be taking the discount. The gross method is often used in textbooks and in practice.