n.

1. 纪律，风纪；教养[U]
   They have good discipline.

   他们纪律严明。

2. 训练，修养[U]
   It takes years of discipline to become a pianist.

   要成为钢琴家需经多年训练。

3. 惩戒，惩罚[U]
   A little discipline would do them a lot of good.

   略加惩处对他们将大有好处。

4. 【宗】教规，戒律[U]
5. 学科[C]

vt.

1. 训练，训导
   He disciplined the new soldiers.

   他训练新兵。

2. 使有纪律；使有条不紊
3. 惩戒
   The boss is not going to discipline anybody.

   老板不会惩罚任何人。

n.

1. the practice of training people to obey rules or a code of behaviour.
   ▸controlled behaviour resulting from such training.
   ▸an activity providing mental or physical training:

   kung fu is a discipline open to old and young.
2. a branch of knowledge, especially one studied in higher education.

v.

1. train (someone) to obey rules or a code of behaviour by punishment or rebuke.
   ▸punish or rebuke formally for an offence.
2. [as adj. disciplined] showing a controlled form of behaviour.