›[U]the practice of making sure that people obey rules and do not cause problems: Personnel rules are used to govern worker conduct and impose discipline on violators.the strict discipline of prison
›[U](alsoself-discipline)the ability to make yourself do something, even if it is difficult, so that you can achieve a goal: the discipline to do sthWorking for a large firm gave him the confidence and discipline to start his own business.For most people, saving money requires a lot of self-discipline.
›[C]a subject or a particular type of work: Our company actively recruits graduates for a wide range of disciplines including engineering, science, and business.