(~s)
In former times, ~s were a class of people who had to work on a particular person’s land and could not leave without that person’s permission.
N-COUNT
(~s)
In former times, ~s were a class of people who had to work on a particular person’s land and could not leave without that person’s permission.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012