A person that simply can never be happy for another person's success whether they know him/her or not. So rather than be happy they always make a point of exposing flaws in that person.

Hating, the result of being a hatersauraus, is not exactly jealousy. The hater does not want to be the person he or she hates, rather the hatersauraus tries to make themselves better by trying to make the other person look worse.

Literally everyone, ever. Including the writer of this definition.