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green light

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noun

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.

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Definition for green light (2 of 2)

green-light

verb (used with object), green·-light·ed or green·-lit, green·-light·ing.

to give permission to proceed; authorize: The renovation project was green-lighted by the board of directors.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for green light

green light

noun

a signal to go, esp a green traffic light
permission to proceed with a project

verb greenlight -lights, -lighting or -lighted (tr)

to permit (a project, etc) to proceed
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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