green light

noun [C] /ˈɡrin ˈlɑɪt/

Definition

› a traffic signal with the green part lit as a signal that it is safe to go: Wait for the green light before crossing the street. › fig. A green light is also permission to do something: The developers were given a green light to go forward with the project.

(Definition of green light noun from the Cambridge Academic Content Dictionary © Cambridge University Press)

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