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)