英汉词典

1. (设备等)有问题的，有毛病的,出故障的
    A faulty piece of equipment has something wrong with it and is not working properly.

    e.g. The money will be used to repair faulty equipment.
           这笔钱将用来修理出故障的设备。

2. (论证或推理)错误的，谬误的,不完善的
    If you describe someone's argument or reasoning as faulty, you mean that it is wrong or contains mistakes, usually because they have not been thinking in a logical way.

    e.g. Their interpretation was faulty — they had misinterpreted things.
           他们的理解是错误的——他们将事情曲解了。