The definition of online defamation is false accusations against an individual or entity made online with malicious intent. Online defamation attempts to attack the character of someone by presenting false statements as fact. Online defamation is also called Internet defamation.
If you are the victim of online defamation you already know the definition because you are experiencing it first hand. Actually in the trenches you might say.
Your exposure to this defamation has probably caused you much grief, upset and emotional angst. It may also have damaged your professional reputation and cost you business or employment.
You probably have recourse to recover these damages in court and should consult with an attorney in your town to see if you can file a suit. Be sure to choose a lawyer that has experience with Internet defamation law that can advise you effectively.
One major problem you may already have experienced is identifying the person that has targeted you for online defamation. Many of these people will operate in the shadows of the Internet. They use anonymous email accounts, proxy servers and re mailers in an attempt to conceal their true identity.
You should consult with an investigator that is experienced with tracking down and identifying people on the Internet.
Whatever you do you cannot just ignore it and hope it will go away. Many times these cases will escalate. It may go from online defamation to full blown stalking and harassment.