gaslight

 
Pronunciation: /ˈgaslʌɪt/

noun

  • a type of lamp in which an incandescent mantle is heated by a jet of burning gas: an era of gaslights and horse-drawn carriages
  • [mass noun] the light produced by a gaslight: in the gaslight she looked paler than ever

verb (gaslights, gaslighting, gaslighted)

[with object]
  • manipulate (someone) by psychological means into doubting their own sanity: in the first episode, Karen Valentine is being gaslighted by her husband
    [from the storyline of the film Gaslight (1944), in which a man psychologically manipulates his wife into believing that she is going insane]

Derivatives

gaslit

adjective