A designer is a person who designs. More formally, a designer is an agent that "specifies the structural properties of a design object". In practice, anyone who creates tangible or intangible objects, products, processes, laws, games, graphics, services, and experiences is referred to as a designer.
Classically, the main area of design was only architecture, which were understood as the major arts. The design of clothing, furniture, and other common artifacts were left mostly to tradition or artisans specializing in hand making them.