shopping mall; shopping centre
Refers to a large indoor or outdoor shopping complex with multiple stores and facilities.
On the weekend, I went shopping at the mall with my family.
pedestrian mall; pedestrianized street
A street or area closed to vehicles, often lined with shops, cafes, and benches.
This street becomes a pedestrian mall on weekends.
On weekends I often go shopping at the nearby mall.
In the evening, I strolled slowly along the pedestrian mall in front of the station.
This mall also has a food court.
A large new mall opened in the suburbs.
百貨店 is a single large department store under one management, whereas モール is a complex housing many independent stores.
モール usually refers to a permanently pedestrianized shopping street, while 歩行者天国 is a street closed to cars only temporarily, such as on weekends.
Borrowed from English 'mall'.