"Alcoholism is an illness, a progressive illness, which can never be cured but which, like some other diseases, can be arrested.

Going 1 step further, many A.A.'s feel that the illness represents the combination of a physical sensitivity to alcohol and a mental obsession with drinking, which, regardless of consequences, cannot be broken by willpower alone. Before they are exposed to A.A., many alcoholics who are unable to stop drinking think of themselves as morally weak or, possibly, mentally unbalanced

The A.A. concept is that alcoholics are sick people who can recover if they will follow a simple Program that has proved successful for more than 1 1/2 million men and women. Once alcoholism has set in, there is nothing morally wrong about being ill. At this stage, free will is not involved, because the suffer has lost the power of choice over alcohol. The important thing is to face the facts of one's illness and to take advantage of the help that is available. There must also be a desire to get well. 

Experience shows that the A.A. program will work for all alcoholics who are sincere in their efforts to stop drinking; it usually will not work for those not absolutely certain that they want to stop".

- 44 Questions, AA Literature 

AA defines Alcoholism