1. a person who manipulates another person into doubting their own memory, perception, or sanity
Usage: modern usage; often used in psychology and relationship contexts

Examples

• She realized her partner was a gaslighter when he repeatedly denied saying things she clearly remembered.
• The gaslighter convinced her that her concerns were unreasonable and all in her head.
• Therapists warn clients about gaslighters who use denial and contradiction as control tactics.
• He was a classic gaslighter, making her question her own judgment at every turn.
• Recognizing a gaslighter early can help you protect your mental health in relationships.
• The documentary exposed how the cult leader was a skilled gaslighter who controlled his followers.