Traffic-light definition

A road signal for directing vehicular traffic by means of colored lights, typically red for stop, green for go, and yellow for proceed with caution.
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A mechanical device consisting of a set of signal lights operating in sequence (usually green to yellow to red and back to green), placed at intersections to regulate traffic.
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A signalling device positioned at a road intersection or pedestrian crossing to indicate when it may be safe to drive, ride or walk, using a universal colour code.
noun
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(philately) The coloured dots on stamp sheet margins printed with offset litho or photogravure methods, used by the printers to check colour accuracy.
noun
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Alternative spelling of traffic light.
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Other Word Forms

Noun

Singular:
traffic-light