1. (

• addiction ,
• dependence ,
• dependance ,
• dependency ,
• habituation

) being abnormally tolerant to and dependent on something that is psychologically or physically habit-forming (especially alcohol or narcotic drugs) ;

2. (

• addiction

) an abnormally strong craving ;

3. (

• addiction

) (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; "under Roman law addiction was the justification for slavery" ;