the largest city in the southwestern US state of Nevada, which is famous for its entertainment and casinos (= places where one can bet money in games and on machines)

He dreams of opening a restaurant in Las Vegas. 他梦想着在拉斯维加斯开一家餐馆。

The whole city of Las Vegas is lit up. 整个拉斯维加斯城灯火辉煌。