Example : In what discipline is his doctorate?.
Teachers should be well trained in their subject.
Anthropology is the study of human beings.

Synonyms : bailiwick, field, field of study, study, subject, subject area, subject field

Example : He quickly learned the discipline of prison routine.
For such a plan to work requires discipline.

Example : He insisted on discipline among the troops.

Example : The offenders deserved the harsh discipline they received.

Synonyms : correction

Example : Parents must discipline their children.
Is this dog trained?.

Synonyms : check, condition, train

Example : The teacher disciplined the pupils rather frequently.

Synonyms : correct, sort out