Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun green_light

2 senses of green light

Sense 1
green light, go-ahead -- (a signal to proceed)
       => traffic light, traffic signal, stoplight -- (a visual signal to control the flow of traffic at intersections)

Sense 2
green light -- (permission to proceed with a project or to take action; "the gave the green light for construction to begin")
       => permission -- (approval to do something; "he asked permission to leave")