Meaning of “green-light” in the English Dictionary

"green-light" in British English

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green-lightverb [ T ]

US

to give permission for something to happen:

If we can't do this movie for $5 million, the studio is not going to green-light it.

(Definition of “green-light” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"green light" in American English

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green lightnoun [ C ]

us /ˈɡrin ˈlɑɪt/

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” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"green light" in Business English

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green lightnoun [ C, usually singular ]

uk us

permission to start doing something:

the green light for sth They finally got the green light for their project.
the green light to do sth The Commission gave us the green light to start negotiations.
The best that investors can hope for is that the report will be seen as a green light for takeovers.

green lightverb [ T ]

also green-light, greenlight uk us

to give permission for someone to do something or for something to happen:

The committee must greenlight the proposal before it goes to the Board.

(Definition of “green light” from the Cambridge Business English Dictionary © Cambridge University Press)