(~s)
A ~ is a person who supervises activities or people, especially workers or students.
...a full-time job as a ~ at a factory...
Each student has a ~ to advise on the writing of the dissertation.
N-COUNT
(~s)
A ~ is a person who supervises activities or people, especially workers or students.
...a full-time job as a ~ at a factory...
Each student has a ~ to advise on the writing of the dissertation.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012