Definition
Approval, or permission to proceed.
Origins
From the standard red-green color scheme used in traffic lights and railway signals.
In Context
- "We have a green light on the project. Work starts today."
- "And Crossrail's Class 345 Aventra fleet finally has the green light to carry passengers to Heathrow Airport, after the Office of Rail and Road granted approval for the European Train Control System (ETCS) Level 2 overlay system."
Also Said As
- go