1. 犯(罪);做(坏事)
    If someone commits a crime or a sin, they do something illegal or bad.

    e.g. I have never committed any crime...
           我从来没犯过罪。
    e.g. This is a man who has committed murder.
           这是一个杀人犯。

2. 自杀
    If someone commits suicide, they deliberately kill themselves.

    e.g. There are unconfirmed reports he tried to commit suicide.
           有未经证实的报道说他曾企图自杀。

3. 拨出，调配(资金、资源等)
    If you commit money or resources to something, you decide to use them for a particular purpose.

    e.g. They called on Western nations to commit more money to the poorest nations...
           他们呼吁西方国家向极端贫困国家投入更多的钱。
    e.g. The government had committed billions of pounds for a programme to reduce acid rain...
           政府已经给一个旨在减少酸雨的方案拨了几十亿英镑。

4. 承诺，保证(做);忠于(某人)
    If you commit yourself to something, you say that you will definitely do it. If you commit yourself to someone, you decide that you want to have a long-term relationship with them.

commit的解释

    e.g. I would advise people to think very carefully about committing themselves to working Sundays...
           我建议大家慎重考虑一下答应周日工作的问题。
    e.g. I'd like a friendship that might lead to something deeper, but I wouldn't want to commit myself too soon...
           我希望拥有一份能进一步发展的友谊，但又不想太快作出承诺。

5. 明确表态
    If you do not want to commit yourself on something, you do not want to say what you really think about it or what you are going to do.

    e.g. It isn't their diplomatic style to commit themselves on such a delicate issue...
           对这样一个微妙的问题明确表态并非他们的外交风格。
    e.g. She didn't want to commit herself one way or the other.
           不管怎样，她都不想明确表态。

6. 把…正式送进(医院、监狱等)
    If someone is committed to a hospital, prison, or other institution, they are officially sent there for a period of time.

    e.g. Arthur's drinking caused him to be committed to a psychiatric hospital.
           阿瑟由于酗酒被送进一家精神病医院。

7. (英国)把…提交高等刑事法庭
    In the British legal system, if someone is committed for trial, they are sent by magistrates to stand trial in a crown court.

    e.g. He is expected to be committed for trial at Liverpool Crown Court.
           预计他会被移交利物浦高等刑事法庭。

8. 把…写下来;把…记住
    If you commit something to paper or to writing, you record it by writing it down. If you commit something to memory, you learn it so that you will remember it.

commit

    e.g. She had not committed anything to paper about it...
           关于这件事她未曾写下只言片语。
    e.g. I'll repeat that so you can commit it to memory.
           我会重复一下，好让你们记住。