If you are a cookie addict, it means you are addicted to cookies. You just can't get enough of them.

Of course there are far more serious forms of addiction out there. The word addict is usually used to refer to someone who is addicted to drugs. Even good things can get you addicted. Work addicts are called workaholics. There are no words for the dangers of being addicted to reading (well, there is "biblioholism"), to the Internet, or to exercise, but those addictions are also real.

Definitions of addict

v to cause (someone or oneself) to become dependent (on something, especially a narcotic drug)

Type of:
accustom, habituate
make psychologically or physically used (to something)

n someone who is physiologically dependent on a substance; abrupt deprivation of the substance produces withdrawal symptoms

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caffein addict, caffeine addict
someone addicted to caffeine
drug addict, junkie, junky
a narcotics addict
speed freak
addict who habitually uses stimulant drugs (especially amphetamines)
cocaine addict
a person addicted to cocaine
binger, crack addict
someone addicted to crack cocaine
heroin addict
someone addicted to heroin
opium addict, opium taker
someone addicted to opium
a drug addict who is discontinuing the use of narcotics
Type of:
drug user, substance abuser, user
a person who takes drugs

n someone who is so ardently devoted to something that it resembles an addiction

“a golf addict
freak, junkie, junky, nut
gym rat
someone who spends all leisure time playing sports or working out in a gymnasium or health spa
Type of:
enthusiast, partisan, partizan
an ardent and enthusiastic supporter of some person or activity

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