Definition of Gas Lighting: What It Is and Why It Matters

Gas lighting refers to a subtle form of psychological manipulation where a person systematically sows doubt in another’s memory, perception, or judgment. Though historically associated with dim, flickering gas lamps in homes, today’s gas lighting operates through whispered lies, selective truths, and emotional dismissal—making it difficult to recognize and even harder to confront.
While the term originated in the 19th century, modern understanding reveals gas lighting as a tool used in personal, professional, and even institutional relationships to undermine confidence and control outcomes.

Historical Origins and Early Usage

The phrase