(~s)
A ~ is someone who develops an abstract idea or set of ideas about a particular subject in order to explain it.
N-COUNT
(~s)
A ~ is someone who develops an abstract idea or set of ideas about a particular subject in order to explain it.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012