department VS mall VS outlet mall

[以下節錄自 Advanced Broadcast 107/9/4]
1. Department store (百貨公司) is one store. They may be in the mall. 

2. A mall (商場) is just a collection of many different department stores. 

3. An outlet mall (暢貨中心)usually means that the stores that you go to there, are cheaper, like you won't spend that much money at those stores. Maybe the same store you go to in the regular mall, but it's uh, maybe the prices are lower. That sort of thing. 

(So you mentioned that much of this E-DA business stuff was located kind of outside of downtown Kaohsiung. That's often where you find out the malls, because the cost of the real estate for the mall is much lower, and so costs overall can be lower. So people often feel outlet malls are a great place to get good deals when you're shopping.)