Read the dictionary definition of addict. All definitions for this word.
1. someone who is physiologically dependent on a substance; abrupt deprivation of the substance produces withdrawal symptoms
2. someone who is so ardently devoted to something that it resembles an addiction
1. a golf addict
2. a car nut
3. a bodybuilding freak
4. a news junkie
3. to cause (someone or oneself) to become dependent (on something, especially a narcotic drug)