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WordReference Random House Learner's Dictionary of American English © 2024ˈtraf•fic ˌlight, n. [countable]- Transporta set of signal lights used to direct traffic at intersections.
Also called stoplight, ˈtraf•fic ˌsig•nal. WordReference Random House Unabridged Dictionary of American English © 2024traf′fic light′, - a set of electrically operated signal lights used to direct or control traffic at intersections. Also called stoplight, traf′fic sig′nal, traf′fic control′ sig′nal.
Collins Concise English Dictionary © HarperCollins Publishers:: traffic light, traffic signal n - one of a set of coloured lights placed at crossroads, junctions, etc, to control the flow of traffic. A red light indicates that traffic must stop and a green light that it may go: usually an amber warning light is added between the red and the green
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