As a Noun
1. The practice of making people obey rules by lecturing or punishing them when they do not. English = discipline.
2. The practice of moral instruction.
As a Verb or Adjective
1. To train people to behave or work in a controlled way, especially by punishing them for behaving badly or breaking a rule or lecturing to them seriously about their behaviour. English = discipline.
2. To teach or instruct people about morals and good behaviour.