a green-colored traffic light used to signal drivers, pedestrians, etc., that they may proceed.

authorization; approval; permission

The railroad has been given the green light on the proposed fare increase.

to give permission to proceed; authorize

The renovation project was green-lighted by the board of directors.

a signal to proceed

permission to proceed with a project or to take action; "the gave the green light for construction to begin"

noun

red light , refusal , veto

noun

agreement , approval , assent , blessing , clearance , consent , dispensation , empowerment , go-ahead * , license , nod * , ok , permission , rubber stamp , sanction , seal of approval , stamp of approval , thumbs-up