someone who is so ardently devoted to something that it resembles an addiction; "a golf addict"; "a car nut"; "a bodybuilding freak"; "a news junkie" (同)nut, freak, junkie, junky
someone who is physiologically dependent on a substance; abrupt deprivation of the substance produces withdrawal symptoms
to cause (someone or oneself) to become dependent (on something, especially a narcotic drug) (同)hook
(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"
an abnormally strong craving
being abnormally tolerant to and dependent on something that is psychologically or physically habit-forming (especially alcohol or narcotic drugs) (同)dependence, dependance, dependency, habituation