Definitions for "brainwashing"
the process of forcible indoctrination into a new set of attitudes and beliefs.
An activity usually involving torture to force victims to change their beliefs and/or actions. The effects of brainwashing are normally short-lived when the torture (or threat thereof) is removed. The word "brainwashing" was invented in 1951 by an American journalist to describe what American soldiers had undergone who had been captured in the Korean War and tortured to change their beliefs. Not the same as mind control.
A method of religious training among Abortionite sects, popular for its effectiveness, especially when the culture at large is supportive.