red light
road signal meaning `stop'; danger signal on railways, etc 红灯（表示｀停＇的道路信号; 铁路等的危险信号）
go through, jump a red light, ie not stop 闯红灯. red-`light district part of a town where there are many prostitutes, sex-shops, etc 红灯区（城市中妓女、 性用品商店等集中的地方）.