10/29/2025
Helpful
Distinction
"Gaslighting" has become a common part of our vocabulary—unfortunately, it also comes with some common misunderstandings.
Merriam-Webster currently defines gaslighting as “the act or practice of grossly misleading someone, especially for one’s own advantage,” but that definition merely reflects how the clinical term has been broadened and oversimplified. As psychologists explain, specific factors make a behavior gaslighting instead of disagreeing, correcting, or trying to persuade someone that they're right.
The word "gaslighting" is derived from a 1938 play called "Gas Light," which was subsequently adapted as the film "Gaslight" in 1944. In that story, a young woman's new husband—who had, unbeknownst to her, murdered her aunt 10 years prior—tries to make her think she's losing her mind. He manipulates her environment (for instance, by repeatedly dimming the gas lights) but denies that anything odd is happening, making her question her reality. His deception was deliberate—he hoped to drive her mad so he could institutionalize her and steal a cache of jewels that were hidden in her aunt's house.
That storyline, the husband's tactics and the reason for them provide helpful context for what gaslighting is and isn't.
Psychology Today defines gaslighting as "an insidious form of manipulation and psychological control. Victims of gaslighting are deliberately and systematically fed false information that leads them to question what they know to be true, often about themselves. They may end up doubting their memory, their perception, and even their sanity. Over time, a gaslighter’s manipulations can grow more complex and potent, making it increasingly difficult for the victim to see the truth."
Robin Stern, Ph.D., wrote the 2007 book "The Gaslight Effect," which helped popularize the term that she says is now losing its meaning. "People often tell me that someone gaslighted them when, in fact, what they are describing is mere disagreement," she writes in Psychology Today.
Here's how she describes it:
"Gaslighting is a form of emotional abuse where one person’s psychological manipulation causes another person to question their reality. Gaslighting can happen between two people in any relationship. A gaslighter preserves his or her sense of self and power over the gaslightee, who adopts the gaslighter’s version of reality over their own."
Ahona Guha D.Psych offers a definition that includes some key factors:
"Gaslighting is a pattern of behaviour, usually intentional, designed to make someone question their own reality, memories, or experiences. The lesson is simple: When identifying gaslighting, look for a pattern (i.e., one time is not enough), and for behaviour that seems intentional or malicious (think 'No, you are over-reacting because you are too sensitive, it didn’t happen that way')."
If we define gaslighting as simply misleading or confusing someone, it becomes easy to mislabel all kinds of normal, imperfect human interactions as such. Disagreements, remembering events differently, and even trying to convince someone of your viewpoint are not gaslighting unless they involve some specific elements. Read more about the misuse of the term below.