Also written as e-commerce. Conducting business electronically via traditional EDI technologies, or online via the Internet. In the traditional sense of selling goods, it's possible to do this electronically because of certain software programs that run the main functions of e-commerce support, such as product display, ordering, shipment, billing, and inventory management. The definition of e-commerce includes business activity that is business-to-business (B2B) and/or business-to-consumer (B2C).