Longman Dictionary of Contemporary English
Wiktionary
n. A person with a chemical or psychological dependency on a drug, especially one which is illegal or improperly procured.
WordNet
Usage examples of "drug addict".
He was Lieutenant Repro, a psychologist attached to the Public Relations staff of the training battalion, and he was a drug addict.
Because three of their four children have become productive, responsible adults, but one is a thirty-five-year-old drug addict who can't kick the habit and take care of her own child.
This drug addict who had exchanged a soccer jersey for a leather jacket, who preferred cigarettes to ice cream cones.
And that monosyllable, he thought, should at least have made the other pause, but again it seemed the drug addict did not even hear him.
It was really not much different from a drug addict chasing a high.
Jerry's a multiple murderer, a drug addict, a dead woman, and I'm all but in the clear.
All those laws recognized that a person could become a drug addict innocently or involuntarily —.
I didn't lose more than half of it in spillage, but I could see she was considering calling either police or medical aid to cope with an alcoholic with the DT's or a drug addict who had lost his hypodermic, whichever the case might be, but she was a brave woman and supplied me with my second jonge Genever on demand.
The other half is that big, dirty, Dutch drug addict, and that's the part that's still alive.