<p><strong>Verb</strong></p><ul><li>(used with object)<ul><li>gaslighted or gaslit, gaslighting.</li><li>to cause (a person) to doubt their judgment, memory, or sanity through the use of psychological manipulation: <em>How do you know if your partner is gaslighting you?</em></li><li>to deceive (a person or group of people) through repetition of a constructed false narrative: <em>The cable news networks have been gaslighting their viewers with partisan coverage of the bill.</em></li></ul></li></ul><p><strong>Noun</strong></p><ul><li>light produced by the combustion of illuminating gas.</li><li>a gas burner or gas jet for producing light through the process of combustion.</li></ul><p><strong>Adjective</strong></p><ul><li>gaslit (def 2).</li></ul>