Traffic light

instrument for directing traffic via changing lights, automatic mechanism in the form of a lantern

A traffic light, also known as a traffic signal, stop light, traffic lamp, stop-and-go lights, robot or semaphore, is a signaling device positioned at a road intersection, pedestrian crossing, or other location in order to indicate which specific movement to drive, ride or walk is assigned the right-of-way at a given moment, using a universal color code (and a precise sequence, for those that are color blind).
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Noun
1. a visual signal to control the flow of traffic at intersections
(synonym) traffic signal, stoplight
(hypernym) light
(hyponym) green light, go-ahead

Synonyms and related words:
Roman candle, aid to navigation, alarm, amber light, balefire, beacon, beacon fire, bell, bell buoy, blinker, blue peter, buoy, caution light, flare, fog bell, fog signal, fog whistle, foghorn, glance, go light, gong buoy, green light, heliograph, high sign, international alphabet flag, international numeral pennant, kick, leer, marker beacon, nod, nudge, parachute flare, pilot flag, poke, police whistle, quarantine flag, radio beacon, red flag, red light, rocket, sailing aid, semaphore, semaphore flag, semaphore telegraph, sign, signal, signal beacon, signal bell, signal gong, signal gun, signal lamp, signal light, signal mast, signal post, signal rocket, signal shot, signal siren, signal tower, spar buoy, stop light, stop-and-go light, the nod, the wink, touch, traffic signal, watch fire, white flag, wigwag, wigwag flag, wink, yellow flag
  

traffic light
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