You use ~ to represent a series of sharp, repeated sounds, for example the sound of someone knocking at a door.
...the ~ at the door.
N-SING; SOUND
You use ~ to represent a series of sharp, repeated sounds, for example the sound of someone knocking at a door.
...the ~ at the door.
N-SING; SOUND
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012