1N-COUNT （尤指英国学校的）级长（协助管理低年级学生的高年级学生） In some schools, especially in Britain, a prefect is an older pupil who does special duties and helps the teachers to control the younger pupils. （尤指英国学校的）级长（协助管理低年级学生的高年级学生）
2N-COUNT 地方行政长官；地方政府部门领导 In some countries, a prefect is the head of the local government administration or of a local government department. 地方行政长官；地方政府部门领导
...the prefect of the city.
该市的市长
...the police prefect for the district of Mehedinti.