definition of
addiction

[1] #1 addiction n. [dependence, dependance, dependency, habituation] being abnormally tolerant to and dependent on something that is psychologically or physically habit-forming (especially alcohol or narcotic drugs). wn

[2] #2 addiction n. an abnormally strong craving. wn

[3] #3 addiction n. (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". wn