Meaning of the word "red light" in English

What does "red light" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

red light

US /ˌred ˈlaɪt/
UK /ˌred ˈlaɪt/
"red light" picture

Noun

1.

a signal light that is red, used as a warning or to indicate that a vehicle or pedestrian must stop

Example:
The car stopped at the red light.
Don't cross the street when the red light is on.
2.

a warning or sign of danger or prohibition

Example:
The company's declining sales were a red light for investors.
His sudden change in behavior was a red light that something was wrong.
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