The term "flat rate" refers to a pricing structure in which a single, fixed price is charged for a product or service, regardless of the time, resources, or complexity involved in providing it. This means that customers pay the same amount for a particular item or service, without any additional charges or fees. The flat rate system can be used by businesses to simplify their pricing structure and make it easier for customers to understand what they will be charged. It is commonly used in industries such as telecommunications, where consumers pay a fixed monthly fee for unlimited calls, text messages, and data usage, regardless of how much they use the service.