1. 毒物；毒药；毒素
    Poison is a substance that harms or kills people or animals if they swallow it or absorb it.

poison的翻译

    e.g. Poison from the weaver fish causes paralysis, swelling, and nausea...
           龙的毒素会引起瘫痪、肿胀和恶心。
    e.g. Mercury is a known poison.
           水银是一种已知的有毒物质。

2. （人）使中毒，毒杀，毒害
    If someone poisons another person, they kill the person or make them ill by giving them poison.

    e.g. The rumours that she had poisoned him could never be proved.
           她曾下毒害他的谣言永远都无法得到证实。

3. （物质）使中毒，毒死
    If you are poisoned by a substance, it makes you very ill and sometimes kills you.

    e.g. Employees were taken to hospital yesterday after being poisoned by fumes...
           因吸入有害气体而中毒的员工昨天被送进了医院。
    e.g. Toxic waste could endanger lives and poison fish.
           有毒废物可能危及生命，毒死鱼类。

4. 在…中放毒；在…上涂毒
    If someone poisons a food, drink, or weapon, they add poison to it so that it can be used to kill someone.

    e.g. If I was your wife I would poison your coffee.
           如果我是你老婆，我会在你的咖啡里下毒。

5. 破坏，污染（水、空气或土地）
    To poison water, air, or land means to damage it with harmful substances such as chemicals.

    e.g. ...the textile and fibre industries that taint the air, poison the water and use vast amounts of natural resources...
           污染空气、破坏水源并消耗大量自然资源的纺织纤维工业
    e.g. The land has been completely poisoned by chemicals.
           土地已被化学品彻底污染。

6. 危害；败坏；毒化
    Something that poisons a good situation or relationship spoils it or destroys it.

    e.g. The whole atmosphere has really been poisoned.
           整个气氛已全然遭到破坏。
    e.g. ...ill-feeling that will poison further talk of a common foreign policy.
           将会危害有关共同外交政策的进一步商讨的敌意

7. （通常指以谎言）使（对…）产生恶感，使（对…）心怀仇视
    If someone poisons your mind against another person, they make you dislike that person, usually by telling you things that are not true.