Second that. Definitions (taken from Wikipedia, edited), with some examples from Shanghai:
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shopping mall is a building or set of buildings that contain stores and have interconnecting walkways that make it easy for people to walk from store to store. The walkways may or may not be enclosed. These malls can include supermarkets and department stores. In the United Kingdom and Australia these are called shopping centres or shopping arcades.
Examples:
Grand Gateway (Xujiahui); Times Square, Shanghai Square, Hongkong Plaza (all Huaihai Road); Plaza 66, CITIC Square, Jiu Guang (all Nanjing West Road), Super Brand Mall (Pudong).
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department store is one large scale store that organizes its goods by departments, such as women's clothes, home furnishings, electronics, and the like. Department stores range from elaborate, fancy shops to practical outlets for ordinary merchandise.
Examples:
Liu Bai, Taipingyang, Huijin (all Xujiahui); Shanghai No. 2, Taipingyang, Parksons, Printemps Shanghai (all Huaihai Road); Shanghai No. 1, New World City, Shanghai Landmark (all Nanjing East Road)
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supermarket is a store that sells a wide variety of goods including food and alcohol (where permitted), medicine, clothes, and other household products that are consumed regularly. It is often part of a chain that owns or controls other supermarkets. Supermarkets usually offer products at low prices.
Examples:
Hualian, Lianhua, Jiechang, Jiadeli, Carrefour (all chains with many supermarkets spread all over the city.) BTW: Hualian and Lianhua simply number their supermarkets, looking out of the window i see Hualian No. 332 down there...
raymond_tung88 said:
Shopping malls are a kind of indoor centre with many different stores. They can have department stores, but they also MUST have smaller stores and shops. They also can have restaurants, office buildings, etc.
A department stores is just ONE store such as Parksons, Wal Mart, Mitsukoshi, etc.