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2.
To deceive, bamboozle.
"Those thugs are trying to gaslight the count" (Capt. Binghamton; Season 4, Episode 29 of "McHale's Navy").
by OED-hamlet January 09, 2013
 
1.
To manipulate events and situations in order to make a person believe that he or she is crazy.

From the 1944 movie with Charles Boyer and Ingrid Bergman.
He kept stealing her keys and putting them in the freezer in order to gaslight her.
by wolfie toutomoutochan February 11, 2005
 
3.
The little light that begins to blink when its time for a fill-up. Under no other circumstances do you really need more gas.
Passenger: Hey, Your close to 'E', don't you need gas?
Driver: No, my gas light isnt on yet.
by Kyle09 May 25, 2007
 
4.
An avante-guard nite club in Greenwich Village during the mid-sixties, that featured folk artists such as Joan Baez, Eric Anderson, and Dave VanRonk.
Young dabbler: " Hey Deb, I'm looking for a cool place to take my girlfriend this Friday night. Have any ideas?"

Deb: "Yeah, why not take her to the Village Gaslight!"
by Jeff Barne May 29, 2007