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green light

green light

46 2.3
A signal that lets you start or continue something, for example a traffic light
  • noun
  • /ɡriːn laɪt/
translation icon : luz verde
  • Blinken gives the green light to send fighter jets to Ukraine.
  • give the green light
  • receive a green light

So the feds have been given a green light by SCOTUS to cut it down.

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Examples

  • So the tribal leadership gave the green light to the development in early spring 2003.

    Academic text (2007)
  • In 1950, many Americans interpreted Acheson's speech as giving a "green light" to North Korea's attack.

    Academic text (1998)
  • OK we are getting a green light on the other side.

  • All units, you have a green light.

  • Do I have the green light?

  • We got the green light.

  • You have a green light.

  • We have been given the green light by university researchers.

    Academic text (1996)
  • We're now in the process of preparing our application to get the green light to begin clinical trials.

  • The committee finally gave the project a green light to proceed after reviewing the proposal.

Synonyms

go-ahead
vsgreen light
31 3.4

Official permission to start something

is the same meaning but uses color signal imagery

Antonyms

2 1.7

A warning that something is wrong and you should stop or be careful

How Permissive

clearance
  • Formal
223 4.4
green light
46 2.3
approved
  • Formal
1.5
permission
1.0

Surface Forms

green light singular
green lights plural

Morphology

green + light

The sense 'official permission' is directly derivable from 'green' (the colour used to signal 'go') plus 'light' (a signal), so a B1 learner who knows both words will readily infer the traffic-signal meaning and its extension to permission. This usage is also cross-linguistically common (e.g. Spanish 'luz verde', French 'feu vert'), supporting clear compositionality and immediate comprehensibility.

Etymology

The noun green light comes from the green light on traffic signals that tells drivers to 'go'. That's why people use green light to mean 'official permission' to start or continue.