/di:n; din/
n
1 clergyman who is head of a cathedral chapter 教长（大教堂教士中职位最高者）; 主任牧师.
2 (also ,rural `dean) (esp Brit) clergyman who is responsible for a number of parishes （乡区的）主任牧师（主管若干牧区）.
3 (a) (in some universities) person who is responsible for discipline （在某些大学中的）学监.
(b) head of a university department of studies （大学的）系主任
*dean of the faculty of law 法律系系主任.
4 (US) = doyen.

n[C]
[Date: 1300-1400; Language: Old French;Origin: deien, from Late Latin decanus 'person in charge of ten others', from Latin decem 'ten']
a priest of high rank in the Christian church who is in charge of several priests or churches
someone in a university who is responsible for a particular area of work
　the admissions dean
AmE someone with a lot of experience of a particular job or subject
British Equivalent: doyendean of
　Neier is the dean of American human rights activism.