the practice of psychologically manipulating someone into questioning their own sanity, memory, or powers of reasoning
he said he was the victim of gaslighting
gaslighting is an insidious technique of deception and psychological manipulation
manipulate (someone) using psychological methods into questioning their own sanity, memory, or powers of reasoning
in the first episode, Karen Valentine is being gaslighted by her husband
we are being gaslit about our health on a grand scale by these people