light produced by the combustion of illuminating gas.
a gas burner or gas jet for producing this kind of light.
gaslit ( def 2 ).
verb (used with object), gaslighted or gaslit, gaslighting.
to cause (a person) to doubt his or her sanity through the use of psychological manipulation: How do you know if your partner is gaslighting you?

1800–10; gas + light1; def 4 in reference to the 1944 movie Gaslight, in which an abusive husband secretly and repeatedly dims and brightens the gaslights in the house while accusing his wife of imagining the flickering

gaslighted, gaslit, adjective
gaslighting, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To gaslight
World English Dictionary
gaslight (ˈɡæsˌlaɪt)
1.  a type of lamp in which the illumination is produced by an incandescent mantle heated by a jet of gas
2.  the light produced by such a lamp

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source's 21st Century Lexicon
Main Entry:  gaslight
Part of Speech:  v
Definition:  to manipulate someone into questioning their own sanity; to subtly drive someone crazy
Etymology:  1956
Usage:  slang; gaslighting, n's 21st Century Lexicon
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Example sentences
To those used to gaslight or candles, their unwavering glare was unnerving.
We are not lighting their parlors with gaslight, are we.
When he prematurely announced that he'd come up with the bulb, stock in gaslight companies took a dive.
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