mod ‧ e ‧ ra ‧ tor /ˈmɒdəreɪtə $ ˈmɑːdəreɪtər/ BrE AmE noun [countable]
1 . someone whose job is to control a discussion or an argument between people
2 . British English someone who makes sure that an examination is fair, and that the marks given are fair and correct
3 . a religious leader who is in charge of the council of the Presbyterian and United Reformed Churches