bailiwick

nouns

the area over which a bailiff has jurisdiction
bailiwick
is a type of (narrower)
in law; the territory within which power can be exercised
jurisdiction
a branch of knowledge
"in what discipline is his doctorate?"; "teachers should be well trained in their subject"; "anthropology is the study of human beings"
bailiwick, discipline, field, field of study, study, subject, subject area, subject field