Meaning

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

noun an abnormally strong craving

noun (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

originFrom addict + -ion; compare (Latin) addictio (“an adjudging, an award”).

Etymology from Wiktionary, CC BY-SA 3.0