red-light

red light

noun
1.
a red lamp, used as a traffic signal to mean “stop.”
2.
an order or directive to halt an action, project, etc.: There's a red light on all unnecessary expenses.
3.
a children's running game in which players must stop when “Red light!” is called.
4.
a signal of danger; warning.

Origin:
1840–50

Dictionary.com Unabridged

red-light

[red-lahyt]
verb (used with object), red-lighted, red-lighting.
Informal. to stop or deter by means of or as if with a red light.

Origin:
1895–1900

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To red-light
Collins
World English Dictionary
red light
 
n
1.  a signal to stop, esp a red traffic signal in a system of traffic lights
2.  a danger signal
3.  an instruction to stop or discontinue
4.  a.  a red lamp in a window of or outside a house indicating that it is a brothel
 b.  (as modifier): a red-light district

Collins English Dictionary - Complete & Unabridged 10th Edition
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