Definitions from Wiktionary (traffic light)

▸ noun:  A signalling device positioned at a road intersection or pedestrian crossing indicating the moment it is safe to drive, ride or walk, using a universal color code.
▸ noun:  (usually in the plural) A road intersection controlled by one or more such devices.
▸ noun:  A colour code using the three signals of a traffic light (green, yellow or amber, and red) as a metaphor.
▸ noun:  (philately) The colored dots on stamp sheet margins printed with offset printing or photogravure methods, used by the printers to check color accuracy.
▸ Also see traffic_light


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