training to act in accordance with rules; drill: military discipline.
activity, exercise, or a regimen that develops or improves a skill; training: A daily stint at the typewriter is excellent discipline for a writer.
punishment inflicted by way of correction and training.
the rigor or training effect of experience, adversity, etc.: the harsh discipline of poverty.
behavior in accord with rules of conduct; behavior and order maintained by training and control: good discipline in an army.