1. a traffic light that controls the flow of vehicles at intersections
2. a red light on the rear of a vehicle that illuminates when the brakes are applied

Examples

• The stoplight turned red just as we approached the intersection.
• Wait for the stoplight to turn green before proceeding.
• There’s a new stoplight at the busy corner near the school.
• The broken stoplight caused a traffic jam during rush hour.
• I noticed your left stoplight isn’t working when you brake.
• The mechanic replaced the burned-out stoplight bulb.
• She slammed on the brakes and her stoplights flashed bright red.