| Noun | 1. | addict - someone who is so ardently devoted to something that it resembles an addiction; "a golf addict"; "a car nut"; "a news junkie"gym rat - someone who spends all leisure time playing sports or working out in a gymnasium or health spa | |
| 2. | addict - someone who is physiologically dependent on a substance; abrupt deprivation of the substance produces withdrawal symptomsspeed freak - addict who habitually uses stimulant drugs (especially amphetamines) | |
| Verb | 1. | addict - to cause (someone or oneself) to become dependent (on something, especially a narcotic drug)accustom, habituate - make psychologically or physically used (to something); "She became habituated to the background music" | |