📒 the practice of training people to obey rules and orders and punishing them if they do not; the controlled behaviour or situation that is the result of this training
📒 a method of training your mind or body or of controlling your behaviour; an area of activity where this is necessary
📒 the ability to control your behaviour or the way you live, work, etc.
📒 an area of knowledge; a subject that people study or are taught, especially in a university