noun

stoplight

traffic light

Wait for the stoplight to turn green.

Wait for the traffic light to turn green.

The car stopped at the stoplight.

The car stopped at the traffic light.

at a traffic light at a signal controlling traffic The car stopped at the traffic light.

Synonyms: traffic light, traffic signal

A compound word from 'stop' and 'light'. Literally, a light that tells you to stop.

'Stoplight' is primarily American English. In British English, 'traffic light' is the common term.

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