- stoplight, brake light - a red light on the rear of a motor vehicle that signals when the brakes are applied to slow or stop
--1 is a kind of visual signal
--1 is a part of brake system, brakes - traffic light, traffic signal, stoplight - a visual signal to control the flow of traffic at intersections
--2 is a kind of light
--2 has particulars: green light, go-ahead; red light; yellow light