discipline

noun:the quality of being able to behave and work in a controlled way which involves obeying particular rules or standards
- Maintaining discipline is essential for a successful army.
noun:a branch of knowledge, typically one studied in higher education
- Sociology is a discipline that explores the development of human society.
verb:to train (someone) to obey rules or a code of behavior by using punishment to correct disobedience
- Parents must discipline their children to teach them right from wrong.