traffic light

traffic light
Red light Red light 1. an electrically operated set of lights at a road intersection which has different lights visible to traffic from different directions, designed to control vehicle traffic through the intersection. Each set of lights typically has a colored red light and also green and amber lights; the color of the light which is lighted at any one time changes automatically to control the flow of traffic through the intersection, allowing flow from different directions in alternating succession. Also called {{traffic light}}, {traffic signal} or {{stop light}}. When the red light is illuminated the signal means to stop; green means to go; and amber means to stop or procede through the intersection with caution. In simple intersections of two roads, a red light visible to traffic on one road will usually be accompanied by a green light visible to traffic on the intersecting road. In some locations the lights may be set to be illuminated in other sequences or combinations; a blinking red light is typically equivalent to a ``stop'' sign, and a blinking amber light typically means ``procede with caution''. [PJC]

2. the condition of a traffic light when the signal visible to the driver of a vehicle is red, signalling that the vehicle must stop and not enter the intersection; I got seven red lights on the way to work. [PJC]

3. figuratively, a sign or signal that one must stop doing what one is presently doing; as, a fatal side effect is often a red light to continuation of a clinical trial. [PJC]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • traffic light — traffic lights N COUNT: usu pl Traffic lights are sets of red, amber, and green lights at the places where roads meet. They control the traffic by signalling when vehicles have to stop and when they can go. Traffic lights can also be referred to… …   English dictionary

  • traffic light — ☆ traffic light or traffic signal n. a mechanical device consisting of a set of signal lights operating in sequence (usually green to yellow to red and back), placed at intersections to regulate traffic …   English World dictionary

  • Traffic light — The traffic light, also known as 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. Its purpose is to indicate, using… …   Wikipedia

  • traffic light — (also light) noun ADJECTIVE ▪ amber (BrE), green, red, yellow (AmE) ▪ temporary ▪ There are temporary traffic lights because of the roadworks …   Collocations dictionary

  • traffic light — noun a visual signal to control the flow of traffic at intersections (Freq. 1) • Syn: ↑traffic signal, ↑stoplight • Hypernyms: ↑light • Hyponyms: ↑green light, ↑go ahead, ↑ …   Useful english dictionary

  • traffic light — 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… …   Moby Thesaurus

  • traffic light — a set of electrically operated signal lights used to direct or control traffic at intersections. Also called stoplight, traffic signal, traffic control signal. [1925 30] * * * …   Universalium

  • traffic light — noun a) 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. b) the coloured dots on stamp sheet margins printed with offs …   Wiktionary

  • traffic light — traf′fic light n. trs a set of electrically operated signal lights used to direct or control traffic at intersections …   From formal English to slang

  • traffic light — noun Date: 1912 a visual signal (as a system of colored lights) for controlling traffic …   New Collegiate Dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”