1. 有毒的；引起中毒的
    Something that is poisonous will kill you or make you ill if you swallow or absorb it.

    e.g. All parts of the yew tree are poisonous, including the berries.
           紫杉的各个部分都有毒，包括浆果。
    e.g. ...a large cloud of poisonous gas.
           一大团有毒气体

2. （动物）有毒的，带毒的
    An animal that is poisonous produces a poison that will kill you or make you ill if the animal bites you.

    e.g. There are hundreds of poisonous spiders and snakes.
           毒蜘蛛和毒蛇成百上千。

3. 极令人厌恶的；会造成危害的；恶毒的
    If you describe something as poisonous, you mean that it is extremely unpleasant and likely to spoil or destroy a good relationship or situation.

poisonous的意思

    e.g. ...poisonous comments.
           恶毒的评论
    e.g. ...lying awake half the night tormented by poisonous suspicions.
           醒着躺了半宿，为卑劣的猜疑所折磨