Discipline can be defined as training or instruction that corrects, molds, develops, improves, or perfects the mental faculties, moral character, or a particular skill. Self means that you apply this discipline to yourself. Basically, self-discipline can be defined as the ability to make yourself do things you know you should do even when you do not want to.

But self-discipline can also be defined as the ability to control yourself even in difficult situations. This implies a restraint exercised over ones own impulses, emotions, or desires. In this respect it is synonymous with self-control.

Other traits that come to mind when one talks of self-discipline are self-evaluation, self-examination, self-observation, and self-reflection. Self-discipline can also be considered one of the foundations or building blocks of dignity.