from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The green-colored light that signals traffic to proceed.
- noun Informal Permission to proceed.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A
traffic lightin its green state (indicating that vehicles may proceed).
- noun idiomatic
approval, or permissionto proceed.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun permission to proceed with a project or to take action
- noun a signal to proceed
from Wiktionary, Creative Commons Attribution/Share-Alike License
From the standard red-green color scheme used in traffic lights and railway signals.
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