The gaslighting meaning is a kind of manipulation in which one person makes another doubt their own memory, perception or sanity, usually again and again over time. The person doing it denies things that happened, twists facts, or insists the other is overreacting, until the target starts to trust the manipulator more than their own mind.
To gaslight someone is the verb. The word comes from a story about a husband who plays exactly this trick on his wife, and it has moved from psychology into everyday speech about families, couples, workplaces and public life.
Entry at a glance
Meaning
Manipulating a person into doubting what they saw, heard or rememberPart of speech
Gaslighting: noun. Gaslight: verb (gaslights, gaslighted or gaslit)Pronunciation
GAS-ly-tingWord forms
gaslight, gaslighter, gaslit, gaslightedOrigin
From a 1938 stage thriller and its film versions, in which a husband dims the gas lampsClose words
manipulation, deception, mind gamesRegister
Neutral; used in psychology, relationships and casual talk
Gaslighting meaning, step by step
A careful gaslighting definition has three parts:
- Denial of reality. The person says something did not happen, or happened differently, even when it plainly did.
- Repetition. It is a pattern, not one argument. Over weeks or months the denials pile up.
- Effect on the target. The other person begins to question their memory and judgment, apologizes for things they did not do, and leans on the manipulator to tell them what is real.
Gaslighting is usually linked to control. The person doing it gains power by becoming the judge of what is true. That is why counsellors treat it as a form of emotional abuse rather than an ordinary disagreement.
Where the word gaslight came from
A gaslight was a lamp that burned coal gas, common in homes and streets in the 1800s. The modern sense comes from a stage thriller first performed in London in 1938, later made into films. In the story, a husband secretly causes the gas lights in the house to flicker and dim, and when his wife notices, he tells her she is imagining things, as part of a plan to make her believe she is losing her mind.
The verb to gaslight in this sense is recorded from around the late 1950s and early 1960s. Therapists picked it up in later decades, and in recent years it has spread widely in ordinary conversation. As it spread, it also gained a looser sense: dismissing or brushing aside someone's point of view.
Phrases that often show up
Gaslighting rarely sounds dramatic. It tends to use small, repeated lines such as:
- "That never happened. You are making it up again."
- "You are too sensitive. It was a joke."
- "Everyone agrees with me that you remember things wrong."
- "I never said that. Why would I say that?"
- "You are confused because you are tired."
Any one of these can be honest in a single moment, because people do misremember. What turns them into gaslighting is the pattern and the aim: to make the other person stop trusting themselves.
How to use gaslight and gaslighting in a sentence
A short gaslight definition for the verb: to work on someone so they distrust their own mind. It is a regular verb, but both past forms are in use: gaslighted and gaslit. You gaslight someone, so it takes a direct object. The person doing it is a gaslighter.
- She felt her old manager had gaslit her about the promised promotion.
- Keeping written notes helped him see he was being gaslighted at home.
- The novel's villain is a patient gaslighter who isolates his sister from her friends.
- Counsellors say gaslighting can slowly wear down a person's confidence.
What gaslighting is not
| Situation | Is it gaslighting? | Why |
|---|---|---|
| Two people remember an event differently | No | Honest memory gaps are normal; neither is trying to control the other |
| Someone tells one lie to avoid trouble | Usually no | A single lie is deception, not a campaign against your perception |
| A friend disagrees with your opinion | No | Opinions can differ without denying facts |
| A partner keeps denying clear events and says you are unstable | Likely yes | Repeated denial plus attacks on your sanity is the core pattern |
Some people worry that the term is now overused for any disagreement. Keeping it for the repeated, controlling pattern keeps its meaning sharp. Related ideas are covered on our pages for manipulate and toxic.
Where you hear it
The word turns up in talk about romantic relationships, family life, friendships and workplaces, where a boss may deny giving an instruction and blame the employee. It also appears in news and public debate, where people accuse institutions of denying plain facts. In psychology and social work it keeps its stricter sense of a pattern of emotional abuse.
Words about how people treat one another are collected in the relationships and emotions hub; two close neighbours are empathy and perception.
Frequently asked questions
What is the meaning of gaslighting in simple words?
It means making someone doubt their own memory or sense of reality so that you can control them. It is usually done through repeated denial of things that really happened.
What does gaslight mean as a verb?
To gaslight someone is to manipulate them into questioning what they saw, heard or remember. That gaslight meaning comes from a story in which a husband dims the lamps and tells his wife she is imagining it.
Is it gaslit or gaslighted?
Both are used. Gaslighted follows the regular pattern and appears often in formal writing, while gaslit is common in speech. Pick one and stay with it in the same piece.
Can gaslighting happen at work?
Yes. A manager or colleague can deny giving instructions, change the story about deadlines, or tell a worker they are too emotional to remember correctly. Keeping emails and notes is one common way people protect themselves.
What is the difference between lying and gaslighting?
A lie hides or bends the truth. Gaslighting goes further: it repeats the false version and attacks the other person's ability to know the truth, so they stop trusting their own mind.
What is the definition of gaslighting I can use in an essay?
If you need to define gaslighting formally, you could write that gaslighting is a pattern of psychological manipulation in which one person causes another to doubt their memory, perception or judgment. Add one example and note where the term came from.