What is the meaning of discipline?

noun

• A branch of knowledge.
  • usage: "in what discipline is his doctorate"; "teachers should be well trained in their subject"; "anthropology is the study of human beings"
  • synonyms: subject, subject area, subject field, field, field of study, study, bailiwick
• A system of rules of conduct or method of practice.
  • usage: "he quickly learned the discipline of prison routine"; "for such a plan to work requires discipline";
• The trait of being well behaved.
  • usage: "he insisted on discipline among the troops"
• Training to improve strength or self-control.
• The act of punishing.
  • usage: "the offenders deserved the harsh discipline they received"
  • synonyms: correction

verb

• Develop (children's) behavior by instruction and practice; especially to teach self-control.
  • usage: "Parents must discipline their children"; "Is this dog trained"
  • synonyms: train, check, condition
• Punish in order to gain control or enforce obedience.
  • usage: "The teacher disciplined the pupils rather frequently"
  • synonyms: correct, sort out