1. 罪犯
    A criminal is a person who regularly commits crimes.

    e.g. A group of gunmen attacked a prison and set free nine criminals in Moroto.
           一伙持枪歹徒袭击了莫罗托的一所监狱，放走了9名罪犯。

2. 犯罪的;犯法的
    Criminal means connected with crime.

    e.g. Her husband faces various criminal charges...
           她丈夫面临多项犯罪指控。
    e.g. At 17, he had a criminal record for petty theft...
           他17岁就有了小偷小摸的犯罪前科。

3. 罪过的;严重错误的
    If you describe an action as criminal, you think it is very wrong or a serious mistake.

    e.g. He said a full-scale dispute involving strikes would be criminal.
           他说如果出现罢工等大规模纠纷那将是极不应该的。