Green light

noun, slang

Definitions

Noun
  1. 1
    A traffic light in its green state (indicating that vehicles may proceed).

    "The drive home was much faster than usual; somehow we managed to hit every green light."

  2. 2
    permission to proceed with a project or to take action wordnet
  3. 3
    Approval, or permission to proceed. idiomatic

    "We have a green light on the project. Work starts today."

  4. 4
    a signal to proceed wordnet
  5. 5
    A go-ahead to commit a crime, specifically to carry out a hit on someone (i.e. to kill). slang

    "Yo man, I heard someone had put a green light out on you, so watch your back."

Etymology

From the standard red-green color scheme used in traffic lights and railway signals.

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