green light

US /ˌɡriːn ˈlaɪt/

UK /ˌɡriːn ˈlaɪt/

1.

permission to do something

:

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The city council gave the project the green light.

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We're waiting for the green light from management before proceeding.

:

permission authorization approval go-ahead sanction

1.

to give permission for something to go ahead

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The director decided to green light the new marketing campaign.

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Once the funding is secured, we can green light the construction.

:

approve authorize permit allow sanction

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green light lighting lightness in the light of green bean lime green