green light

English Thesaurus

1. permission to proceed with a project or to take action (noun.communication)

hypernym	:	permission,
definition	:	approval to do something (noun.communication)

2. a signal to proceed (noun.communication)

hypernym	:	stoplight, traffic light, traffic signal,
definition	:	a visual signal to control the flow of traffic at intersections (noun.communication)

derivation	:	go ahead, plow ahead,
definition	:	proceed (with a plan of action) (verb.communication)

derivation	:	go ahead, plow ahead,
definition	:	proceed (with a plan of action) (verb.communication)