1. （英国的）户籍管理员，登记员
In Britain, a registrar is a person whose job is to keep official records, especially of births, marriages, and deaths.

2. （英国学院或大学的）注册主任，教务主任
A registrar is a senior administrative official in a British college or university.

1. someone responsible for keeping records

Synonym: record-keeperrecorder

2. the administrator responsible for student records

3. a person employed to keep a record of the owners of stocks and bonds issued by the company