discipline >> /ˈdɪsəplən/
Definition: [transitive verb] Train (someone) to obey rules or a code of behavior, using punishment to correct disobedience.
Example: many parents have been afraid to discipline their children
Definition: [noun] The practice of training people to obey rules or a code of behavior, using punishment to correct disobedience.
Example: a lack of proper parental and school discipline
Definition: [noun] A branch of knowledge, typically one studied in higher education.
Example: sociology is a fairly new discipline