1 to do sth bad or illegal 犯（罪）；做（不好的事）: to commit a crime 犯罪to commit suicide 自杀

2 commit sb/yourself (to sth/to doing sth) to make a definite agreement or promise to do sth 承诺（做某事）: I can't commit myself to helping you tomorrow. 我明天不一定能帮你的忙。

3 commit yourself (on sth) to make a decision or give an opinion publicly so that it is then difficult to change it 作出决定；公开表态: I'm not going to commit myself on who will win the election. 我不便就谁会在选举中获胜发表看法。 ☞Look at noncommittal. 参看noncommittal。

4 (formal 正式) to decide to use money or time in a certain way 决定把（金钱、时间）投入: The government has committed £2 billion to education. 政府已决定将20亿英镑投入教育事业。

5 (formal 正式)commit sb to sth to send sb to a prison, mental hospital, etc 送进（监狱、精神病院等）