(~s)
A ~ is a system of transport in which small trains travel along a single rail which is usually high above the ground.
N-COUNT: also by N
(~s)
A ~ is a system of transport in which small trains travel along a single rail which is usually high above the ground.
N-COUNT: also by N
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012