1. 训练;纪律;风纪
    Discipline is the practice of making people obey rules or standards of behaviour, and punishing them when they do not.

    e.g. Order and discipline have been placed in the hands of headmasters and governing bodies.
           维持秩序和纪律的工作已交接给了校长和管理机构了。
    e.g. ...discipline problems in the classroom.
           课堂纪律问题

2. 自制力;遵守纪律
    Discipline is the quality of being able to behave and work in a controlled way which involves obeying particular rules or standards.

    e.g. It was that image of calm and discipline that appealed to voters.
           正是那个冷静、自律的形象打动了选民。

3. 训练;磨炼
    If you refer to an activity or situation as a discipline, you mean that, in order to be successful in it, you need to behave in a strictly controlled way and obey particular rules or standards.

    e.g. ...inner disciplines like transcendental meditation...
           内省，如冥思静坐
    e.g. The discipline of studying music can help children develop good work habits.
           音乐学习中的训练可以帮助孩子们培养好的工作习惯。

4. 惩罚;处罚;处分
    If someone is disciplined for something that they have done wrong, they are punished for it.

    e.g. The workman was disciplined by his company but not dismissed...
           那个工人受到了公司的处罚，但并没有被解雇。
    e.g. Her husband had at last taken a share in disciplining the boy.
           她的丈夫最后也加了进来一起教训那个男孩。

5. 训练;训导;管教
    If you discipline yourself to do something, you train yourself to behave and work in a strictly controlled and regular way.

discipline在线翻译

    e.g. Out on the course you must discipline yourself to let go of detailed theory...
           在高尔夫球场上，你必须训练自己做到不拘泥于细枝末节的理论。
    e.g. I'm very good at disciplining myself.
           我能做到严格自律。

6. (尤指大学里的)学科，科目
    A discipline is a particular area of study, especially a subject of study in a college or university.

    e.g. You've got to make sure that people work together across disciplines...
           你必须确保让那些出身不同学科的人一起共事。
    e.g. We're looking for people from a wide range of disciplines.
           我们需要各个学科的人才。

7. see also: self-discipline