A product line is a group of products that are closely related be because they function in a similar manner, are sold to the same customer groups, are marketed through the same types of outlets, or fall within given price ranges. For example, Nike produces several lines of athletic shoes and apparel, and Marriott offers several lines of hotels.
Product line is the group of related products marked by physical similarities or intended for the same market.
Product line is a group of related products considered a unit because of marketing, technical, or use similarities and marketed by a firm.