Definition of disciplines
a branch of knowledge, typically one studied in higher education.
The continuing development of comprehensive universities should allow them to extend their knowledge base in multiple disciplines and fields.
the practice of training people to obey rules or a code of behavior, using punishment to correct disobedience.
They know that forms of discipline which reward good behaviour, rather than punishing the bad, are more effective, safer and promote better relationships at home.
train (someone) to obey rules or a code of behavior, using punishment to correct disobedience.
The slant-eyed boy took a little longer, but showed the same obstinate behavior and the sheriff had to discipline him accordingly.