The definition of "addiction" is the state of being enslaved to something that is psychologically or physically habit-forming (such as narcotics), to such an extent that to discontinue the habit or practice can lead to severe trauma. In other words, you love something so much that you have developed a habit of using it or playing it, to such an extent that not doing so leaves you feeling cranky or nervous; and you are becoming rather inept in other areas of life.
Some experts believe World of Warcraft can be "addictive". Here's a way to break your WoW "addiction".
http://www.wikihow.com/Break-a-World-of ... -Addiction