Someone who is a danger to human beings. Abuse can take many different forms. Abusers can use prolonged abuse tactics over a long period of time to try to control, harm or damage someones reputation and/or to physically or psychologically harm them.
'Example' Abuser- Vitale opened websites about his victim. He tries to manipulate relationships, degrades and uses psychological torture and verbal insults to taunt people. Also uses stalking as a control tool. He is an abuser.