The definition of an addiction is an obsessive need for a habit forming substance or activity.
The constant craving for a drug is an example of an addiction.
the condition of being addicted (to a habit) or of being an addict; specif., the habitual use of narcotic drugs
- a. A condition involving use of a substance, such as a drug or alcohol, or engagement in a behavior, such as gambling, in which a person has strong cravings, is unable to stop or limit the activity, continues the activity despite harmful consequences, and experiences distress upon discontinuance: a drug used in the treatment of heroin addiction.b. An instance of this: a person with a sex addiction.
- a. The condition of being habitually occupied with or involved in something: addiction to romance novels.b. The condition of using something on a regular or dependent basis: fossil fuel addiction.c. An instance of one of these conditions: had an addiction to fast cars.
From addict + -ion; compare (Latin) addictio (“an adjudging, an award”)