Outdoor furniture refers to a series of indoor furniture related appliances set up in open or semi open outdoor spaces to facilitate people's healthy, comfortable, and efficient public outdoor activities. It mainly covers four categories of products: urban public outdoor furniture, garden outdoor leisure furniture, commercial outdoor furniture, and portable outdoor furniture.

Outdoor furniture is an important element that determines the material basis of the spatial function and represents the form of outdoor space in buildings (including spaces outside of the sky, also known as "grey spaces").

The difference between outdoor furniture and ordinary furniture is that it is an element of urban landscape environment - a "prop" of the city, with the characteristics of general "promotion" and "communication". As an important component of furniture, outdoor furniture generally refers to the rest facilities in urban landscape facilities. For example, outdoor or semi outdoor spaces such as rest tables and chairs, sunshades, etc.