Whats the difference between a vain person and a narcissist?Watch
Narcissism can also develop into 'Narcissistic Personality Disorder' (NPD) which is a personality disorder in which a person is excessively preoccupied with personal adequacy, power, prestige and vanity, mentally unable to see the destructive damage they are causing to themselves and to others in the process.
In comparison, vanity is just the excessive belief in one's own abilities or attractiveness to others.
a narcissistic person admires themselves
A narcissist cares/thinks too much of themselves and will go out of their way to make you feel the same way about them. If you criticise them or if they think you're criticising them they will turn your life into a living hell in order to feel superior again. These people have a deep sense of inferiority. Example: My sister's mother-in-law is a narcissistic *****. She borrowed thousands from my parents and my other sister and when we asked for her to pay it back (we knew she had more than enough so she could have easily paid it back) the woman started a war with us because she started feeling inferior. She couldn't stand that she had to borrow from someone who was in a better position financially and this brought out the cracks in her superiority complex. She really had a go at us but what she basically said was "how dare you ask me for your money back?" She tried to maintain a level of control (a false sense of superiority) by making it seem like we were the ones in the wrong for asking for our money back. When she realised she wouldn't get her way she paid us back (literally one day after we asked) and never stepped foot in our house or had a nice conversation with my parents again. It's been 9 months I think and to this day if my parents try to make peace (which they have sooo many times!) she brings up the subject to remind us of what we did because it feeds her ego and gives her the illusion of superiority. Another example if you watch Once Upon A Time: Regina as the Evil Queen in Once Upon A Time seems like a narcissist. I'm debating whether or not Regina (as Henry's mum) is because she seems more like an incredibly extreme case of borderline personality instead of narcissistic personality. If you don't watch the show then never mind.