red light
noun
1- a red traffic light or similar signal that instructs moving vehicles to stop（交通）红灯, （交通）停止信号。
1.1
- a refusal or an order to stop an action拒绝; （活动的）停止令：
some subsidies would get a red light and be prohibited.
一些补贴将被叫停并进而被取消。