noun
stoplight
noun
1
A traffic signal that uses red, amber, and green lights to control traffic.
"Turn left at the next stoplight."
2
The red light on the back of a vehicle that comes on when the brakes are applied.
"One of the car's stoplights was out, which is why we got pulled over."
How to Use Stoplight
Learner’s notesIn plain EnglishA traffic light, or a vehicle's brake light.
UK vs US
American English favours "stoplight"; British English generally says "traffic light(s)".
Word Forms
stoplights plural
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Turn left at the next _____.
Etymology
From stop plus light.