What is the definition or description of: poker addiction?

Any behavior can be: addictive if it meets four criteria: 1) Mood altering, 2) Compulsive, 3) Does damage and 4) Isn't stopped despite the damage. Plus, look at the extent of Dependence, Craving, Tolerance and Bingeing vs. Chronic use. Poker is in the Gambling area--one of six big addictions in the USA (alcohol, drugs, Internet, Sex and Food being the other five).