Read the dictionary definition of addiction. All definitions for this word.
1. (Roman law) a formal award by a magistrate of a thing or person to another person (as the award of a debtor to his creditor); a surrender to a master
1. under Roman law addiction was the justification for slavery
2. an abnormally strong craving
3. being abnormally tolerant to and dependent on something that is psychologically or physically habit-forming (especially alcohol or narcotic drugs)