B2 a person who cannot stop doing or using something, especially something harmful(尤指对有害之物)有瘾的人,入迷的人
More examples
Some drug addicts turn to crime in order to support their habit.
They were shocked to discover that their daughter was a heroin addict.
It's difficult to wean an addict off cocaine once they're hooked.
He went to a rehabilitation centre where they help addicts to overcome their addiction.
The children were in danger of picking up needles used by crack addicts.
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