Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun stoplight

2 senses of stoplight

Sense 1
stoplight, brake light -- (a red light on the rear of a motor vehicle that signals when the brakes are applied to slow or stop)
       => visual signal -- (a signal that involves visual communication)

Sense 2
traffic light, traffic signal, stoplight -- (a visual signal to control the flow of traffic at intersections)
       => light -- (a visual warning signal; "they saw the light of the beacon"; "there was a light at every corner")