Definition from Wiktionary, the free dictionary
- gas lamp (US)
gas + light. The verb sense derives from the 1938 stage play Gas Light, in which a husband attempts to convince his wife and others that she is insane by manipulating small elements of their environment.
gaslight (plural gaslights)
- (Britain) The light produced by burning piped illuminating gas.
- (Britain) A lamp which operates by burning gas.
light produced by burning gas
lamp that burns gas
- (slang) To manipulate someone psychologically such that they question their own sanity, particularly by leading them to doubt their own experiences or perceptions of reality.