traffic light

American  

noun

1. a set of electrically operated signal lights used to direct or control traffic at intersections.

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traffic light British  

noun

1. 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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Etymology

Origin of traffic light

First recorded in 1925–30

Example Sentences

In the capital Hanoi, patriotic red-and-yellow banners flutter from lampposts and traffic lights, extolling the "national festival" where people "eagerly cast ballots".

From Barron's

This can create everyday challenges such as interpreting traffic lights, coordinating clothing, or judging whether meat is fully cooked.

From Science Daily

One way to imagine this system is like traffic lights guiding cars through a busy city.

From Science Daily

"A broad traffic light assessment of the public finances would make governments' multiple objectives – and the associated trade-offs faced – much more transparent and explicit," she said.

From BBC

There are no traffic lights on the route and he drives swiftly through narrow streets.

From BBC

Related Words

• red light
• stoplight
• traffic control
• yellow light