Addiction addiction" is used in many contexts to describe an obsession, compulsion, or excessive psychological dependence, such asdrug addiction (e.g. alcoholism), video game addiction, crime, money, work addiction, compulsive overeating, problem gambling, computer addiction, nicotine addiction, pornography addiction, plastic surgery addiction, etc.In medical terminology, an addiction is a state in which the body depends on a substance for normal functioning and may occur along with physical dependence, as in drug addiction.