(~s)
A ~ is a piece of string with a weight attached to the end that is used to check that something such as a wall is vertical or that it slopes at the correct angle.
N-COUNT
(~s)
A ~ is a piece of string with a weight attached to the end that is used to check that something such as a wall is vertical or that it slopes at the correct angle.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012