(~s)
An ~ is a person who tells the police that someone has done something illegal.
...two men suspected of being police ~s.
N-COUNT
(~s)
An ~ is a person who tells the police that someone has done something illegal.
...two men suspected of being police ~s.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012