英汉词典

1. 吸毒成瘾者；瘾君子
    An addict is someone who takes harmful drugs and cannot stop taking them.

    e.g. He's only 24 years old and a drug addict.
           他只有24岁，却是个瘾君子。

2. 对…入迷的人;…迷
    If you say that someone is an addict, you mean that they like a particular activity very much and spend as much time doing it as they can.

    e.g. She is a TV addict and watches as much as she can.
           她是个电视迷，看起电视来没完没了。