green light

noun
1.
a green-colored traffic light used to signal drivers, pedestrians, etc., that they may proceed.
2.
authorization; approval; permission: The railroad has been given the green light on the proposed fare increase.
Dictionary.com Unabridged

green-light

verb (used with object), green-lighted or green-lit, green-lighting.
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 Dictionary, © Random House, Inc. 2014.
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World English Dictionary
green light
 
n
1.  a signal to go, esp a green traffic light
2.  permission to proceed with a project
 
vb , -lights, -lighting, -lighted
3.  to permit (a project, etc) to proceed

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Slang Dictionary

green light definition


  1. n.
    the signal to go ahead with something; the okay. (See also go-ahead; high sign.) : When we get the green light, we'll start.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw-Hill Education.
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